Hitachi HDP725050GLA360 Saturn OEM Manual User To The 7a0cdc68 105a 4432 Aad1 1dd9763bd50b

User Manual: Hitachi HDP725050GLA360 to the manual

Open the PDF directly: View PDF .
Page Count: 258

Download
Open PDF In Browser	View PDF

Hitachi Global Storage Technologies

Hard Disk Drive Specification

Hitachi Deskstar 7K1000.C
Hitachi Ultrastar A7K2000
Hitachi CinemaStar 7K1000.C
3.5 inch Serial ATA hard disk drive
Models:

HDS721016CLA382
HDS721016CLA682
HDS721025CLA382
HDS721025CLA682
HDS721032CLA362
HDS721032CLA662
HDS721050CLA362
HDS721050CLA662
HDS721064CLA332
HDS721064CLA632
HDS721075CLA332
HDS721075CLA632
HDS721010CLA332
HDS721010CLA632

HUA722050CLA330/1 HCS721016CLA382
HUA722010CLA330/1 HCS721025CLA382
HCS721032CLA382
HCS721050CLA382
HCS721075CLA332
HCS721010CLA332

Revision 2.6

30. June. 2011

- Hitachi hard disk drive specifications –

Revision 2.6 (30 June 2011)
The following paragraph does not apply to the United Kingdom or any country where such provisions are
inconsistent with local law: HITACHI GLOBAL STORAGE TECHNOLOGIES PROVIDES THIS
PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer or express or implied
warranties in certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to
the information herein; these changes will be incorporated in new editions of the publication. Hitachi may
make improvements or changes in any products or programs described in this publication at any time.
It is possible that this publication may contain reference to, or information about, Hitachi products (machines
and programs), programming, or services that are not announced in your country. Such references or
information must not be construed to mean that Hitachi intends to announce such Hitachi products,
programming, or services in your country.
Technical information about this product is available by contacting your local Hitachi Global Storage
Technologies representative or on the Internet at http://www.hitachigst.com
Hitachi Global Storage Technologies may have patents or pending patent applications covering subject matter
in this document. The furnishing of this document does not give you any license to these patents.
© Copyright Hitachi Global Storage Technologies
Note to U.S. Government Users —Documentation related to restricted rights —Use, duplication or disclosure
is subject to restrictions set forth in GSA ADP Schedule Contract with Hitachi Global Storage Technologies.

- Hitachi hard disk drive specifications –

Table of contents
1

General................................................................................................................................................................10

1.1
1.2
1.3
1.4
2

Introduction .................................................................................................................................... 10
Glossary ........................................................................................................................................... 11
General caution............................................................................................................................... 11
References ....................................................................................................................................... 11

General features .................................................................................................................................................12

Part 1. Functional specification ....................................................................................................................... 13
3

Fixed disk subsystem description .......................................................................................................................14

3.1
3.2
3.3
4

Control Electronics ......................................................................................................................... 14
Head disk assembly ........................................................................................................................ 14
Actuator ........................................................................................................................................... 14

Drive characteristics ............................................................................................................................................15

4.1
4.2
4.3
4.4
4.5

Default logical drive parameters ................................................................................................... 15
Data sheet ....................................................................................................................................... 17
World Wide Name Assignment ...................................................................................................... 17
Drive organization .......................................................................................................................... 18
Performance characteristics .......................................................................................................... 19

5
6

Defect flagging strategy ......................................................................................................................................23
Specification ........................................................................................................................................................24

General................................................................................................................................................................47

6.1
Electrical interface ......................................................................................................................... 24
6.2
Environment ................................................................................................................................... 28
6.3
DC power requirements ................................................................................................................. 30
6.4
Reliability ........................................................................................................................................ 32
6.5
Mechanical specifications............................................................................................................... 34
6.6
Vibration and shock ........................................................................................................................ 40
6.7
Acoustics .......................................................................................................................................... 43
6.8
Identification labels ........................................................................................................................ 43
6.9
Safety ............................................................................................................................................... 44
6.10 Electromagnetic compatibility ....................................................................................................... 45
Part 2. Interface Specification ......................................................................................................................... 46
7.1
7.2
7.3
8

Registers .............................................................................................................................................................48

8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
8.13
9

Introduction .................................................................................................................................... 47
Terminology ..................................................................................................................................... 47
Deviations From Standard............................................................................................................. 47
Alternate Status Register .............................................................................................................. 48
Command register .......................................................................................................................... 48
Cylinder High Register .................................................................................................................. 48
Cylinder Low Register .................................................................................................................... 49
Data Register .................................................................................................................................. 49
Device Control Register.................................................................................................................. 49
Drive Address Register................................................................................................................... 50
Device/Head Register ..................................................................................................................... 50
Error Register ................................................................................................................................. 51
Features Register ........................................................................................................................... 52
Sector Count Register .................................................................................................................... 52
Sector Number Register ................................................................................................................. 52
Status Register ............................................................................................................................... 53

General Operation Descriptions ..........................................................................................................................54

9.1
9.2
9.3

Reset Response ............................................................................................................................... 54
Diagnostic and Reset considerations............................................................................................. 55
Sector Addressing Mode ................................................................................................................. 56
- Hitachi hard disk drive specifications –

9.4
9.5
9.6
9.7
9.8
9.9
9.10
9.11
9.12
9.13
9.14
9.15
9.16
9.17
9.18
10

Command Protocol ........................................................................................................................................100

10.1
10.2
10.3
10.4
10.5
11

Power Management Feature ......................................................................................................... 57
SMART Function ............................................................................................................................ 59
Security Mode Feature Set ............................................................................................................ 61
Host Protected Area Feature ......................................................................................................... 67
Write Cache Function ..................................................................................................................... 69
Reassign Function .......................................................................................................................... 70
Power-up in Standby feature set ................................................................................................... 71
Advanced Power Management feature set (APM) ....................................................................... 71
48-bit Address Feature Set ............................................................................................................ 72
Streaming feature Set .................................................................................................................... 73
SATA BIST (Built-in Self Test) ...................................................................................................... 75
SATA Interface Power Management ............................................................................................. 75
Software Setting Preservation....................................................................................................... 76
SATA II Optional Features ............................................................................................................ 77
SCT Command Transport feature Set .......................................................................................... 81
PIO Data In commands ................................................................................................................ 100
PIO Data Out commands ............................................................................................................. 101
Non-Data commands .................................................................................................................... 101
DMA Data In commands and DMA Data Out commands ......................................................... 102
First-party DMA commands ........................................................................................................ 102

Command Descriptions .....................................................................................................................................103

11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
11.12
11.13
11.14
11.15
11.16
11.17
11.18
11.19
11.20
11.21
11.22
11.23
11.24
11.25
11.26
11.27
11.28
11.29
11.30
11.31
11.32

Check Power Mode (E5h/98h) ...................................................................................................... 107
Configure Stream (51h) ................................................................................................................ 108
Device Configuration Overlay (B1h) ........................................................................................... 110
Download Microcode (92h) ........................................................................................................... 114
Execute Device Diagnostic (90h) ................................................................................................. 116
Flush Cache (E7h) ........................................................................................................................ 117
Flush Cache Ext (EAh)................................................................................................................. 118
Format Track (50h)....................................................................................................................... 119
Format Unit (F7h) ........................................................................................................................ 121
Identify Device (ECh) ............................................................................................................... 122
Idle (E3h/97h) ............................................................................................................................ 133
Idle Immediate (E1h/95h) ........................................................................................................ 135
Initialize Device Parameters (91h) .......................................................................................... 136
Read Buffer (E4h) ..................................................................................................................... 137
Read DMA(C8h/C9h) ................................................................................................................ 138
Read DMA Ext (25h) ................................................................................................................. 140
Read FPDMA Queued (60h) ..................................................................................................... 142
Read Log Ext (2Fh) ................................................................................................................... 144
Read Multiple (C4h).................................................................................................................. 157
Read Multiple Ext (29h) ........................................................................................................... 158
Read Native Max Address (F8h) .............................................................................................. 160
Read Native Max Address Ext (27h) ....................................................................................... 161
Read Sector(s) (20h/21h)........................................................................................................... 163
Read Sector(s) Ext (24h) ........................................................................................................... 165
Read Stream DMA (2Ah) .......................................................................................................... 167
Read Stream PIO (2Bh) ............................................................................................................ 170
Read Verify Sector(s) (40h/41h)................................................................................................ 173
Read Verify Sector(s) Ext (42h) ................................................................................................ 175
Recalibrate (1xh) ....................................................................................................................... 177
Security Disable Password (F6h) ............................................................................................. 178
Security Erase Prepare (F3h) .................................................................................................. 180
Security Erase Unit (F4h) ........................................................................................................ 181
- Hitachi hard disk drive specifications –

11.33
11.34
11.35
11.36
11.37
11.38
11.39
11.40
11.41
11.42
11.43
11.44
11.45
11.46
11.47
11.48
11.49
11.50
11.51
11.52
11.53
11.54
11.55
11.56
11.57
11.58
12

Security Freeze Lock (F5h) ...................................................................................................... 183
Security Set Password (F1h) .................................................................................................... 184
Security Unlock (F2h) ............................................................................................................... 186
Seek (7xh) .................................................................................................................................. 188
Sense Condition (F0h : Vendor specific for Cinemastar)........................................................ 189
Set Max Address (F9h) ............................................................................................................. 194
Set Max Address Ext (37h) ....................................................................................................... 200
Set Multiple (C6h)..................................................................................................................... 202
Sleep (E6h/99h) ......................................................................................................................... 203
SMART Function Set (B0h) ..................................................................................................... 204
Standby (E2h/96h) .................................................................................................................... 222
Standby Immediate (E0h/94h) ................................................................................................. 224
Write Buffer (E8h) .................................................................................................................... 225
Write DMA (Cah/CBh) .............................................................................................................. 226
Write DMA FUA Ext (3Dh) ...................................................................................................... 228
Write DMA Ext (35h) ................................................................................................................ 230
Write FPDMA Queued (61h) .................................................................................................... 232
Write Log Ext (3Fh) .................................................................................................................. 234
Write Multiple (C5h) ................................................................................................................. 236
Write Multiple Ext (39h) .......................................................................................................... 238
Write Multiple FUA Ext (CEh) ................................................................................................ 240
Write Sector(s) (30h/31h) .......................................................................................................... 242
Write Sector(s) Ext (34h) .......................................................................................................... 244
Write Stream DMA (3Ah) ......................................................................................................... 246
Write Stream PIO (3Bh) ........................................................................................................... 249
Write Uncorrectable Ext (45h) ................................................................................................. 252

Timings ..........................................................................................................................................................254

- Hitachi hard disk drive specifications –

List of tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Table 25
Table 26
Table 27
Table 28
Table 29
Table 30
Table 31
Table 32
Table 33
Table 34
Table 35
Table 36
Table 37
Table 38
Table 39
Table 40
Table 41
Table 42
Table 43
Table 44
Table 45
Table 46
Table 47
Table 48
Table 49
Table 50

Type and Model# ........................................................................................................................ 10
Formatted capacity .................................................................................................................... 15
Formatted capacity --Continued-- ............................................................................................ 15
Formatted capacity --Continued-- ............................................................................................ 15
Formatted capacity --Continued-- ............................................................................................ 16
Mechanical positioning performance ....................................................................................... 17
World Wide Name Assignment................................................................................................. 17
Command overhead ................................................................................................................... 19
Mechanical positioning performance ....................................................................................... 20
Single Track Seek Time........................................................................................................... 21
Latency Time ............................................................................................................................ 21
Drive ready time ...................................................................................................................... 21
Mode transition times ............................................................................................................. 22
Interface connector pins and I/O signals ............................................................................... 25
Parameter descriptions ........................................................................................................... 27
Temperature and humidity..................................................................................................... 28
Input voltage ............................................................................................................................ 30
Power supply current of 2 Disk model ................................................................................... 30
Power supply current of 1 Disk model ................................................................................... 31
Power supply generated ripple at drive power connector..................................................... 31
Physical Dimensions ............................................................................................................... 37
Random vibration PSD profile break points (operating) ...................................................... 40
Random vibration PSD profile break points (nonoperating) ................................................ 41
Sinusoidal shock wave............................................................................................................. 42
Rotational Shock ...................................................................................................................... 42
Sound power levels .................................................................................................................. 43
Alternate Status Register ....................................................................................................... 48
Device Control Register........................................................................................................... 49
Drive Address Register............................................................................................................ 50
Device/Head Register .............................................................................................................. 50
Error Register .......................................................................................................................... 51
Status Register ........................................................................................................................ 53
Reset Response ........................................................................................................................ 54
Default Register Values........................................................................................................... 55
Diagnostic Codes...................................................................................................................... 55
Power conditions ...................................................................................................................... 58
Command table for device lock operation -1 .......................................................................... 65
Command table for device lock operation -2 .......................................................................... 66
Phy Event Counter Identifiers ............................................................................................... 78
READ LOG EXT Log Page 11h data structure definition .................................................... 80
SCT Log Page and direction ................................................................................................... 81
Identify Device Information Word 206 ................................................................................... 81
Output Registers of SCT Command Using SMART ............................................................. 83
Input Registers of SCT Command Using SMART ................................................................ 83
Input Registers of SCT Command Using Write Log Ext ...................................................... 84
Output Registers of SCT Command Using Write Log Ext ................................................... 84
Key Sector Format ................................................................................................................... 85
SCT Action Code List .............................................................................................................. 85
Extended Status Code ............................................................................................................. 86
Input Registers of SCT Data Transfer Using SMART .......................................................... 87
- Hitachi hard disk drive specifications –

Table 51
Table 52
Table 53
Table 54
Table 55
Table 56
Table 57
Table 58
Table 59
Table 60
Table 61
Table 62
Table 63
Table 64
Table 65
Table 66
Table 67
Table 68
Table 69
Table 70
Table 71
Table 72
Table 73
Table 74
Table 75
Table 76
Table 77
Table 78
Table 79
Table 80
Table 81
Table 82
Table 83
Table 84
Table 85
Table 86
Table 87
Table 88
Table 89
Table 90
Table 91
Table 92
Table 93
Table 94
Table 95
Table 96
Table 97
Table 98
Table 99
Table 100
Table 101
Table 102
Table 103
Table 104

Input Registers of SCT Data Transfer using Read/Write Log Ext....................................... 87
Intput Registers of SCT Status Request Using SMART ...................................................... 88
Input Registers of SCT Status Request Using Read Log Ext .............................................. 88
Data Format of SCT Status Response ................................................................................... 90
SCT Write Same (Inputs) ........................................................................................................ 91
SCT Write Same (Outputs) ..................................................................................................... 91
Error Recovery Control command (Inputs) ........................................................................... 94
Error Recovery Control command (Onputs) .......................................................................... 94
Feature Control command (Inputs) ........................................................................................ 95
Feature Control command (Outputs) ..................................................................................... 95
Feature Code List .................................................................................................................... 96
SCT Data Table command (Inputs) ........................................................................................ 97
SCT Data Table command (Outputs) ..................................................................................... 97
Table ID .................................................................................................................................... 97
Data Format of HDA Absolute Temperature History Table ................................................. 99
Command Set ......................................................................................................................... 103
Command Set --Continued-- ................................................................................................. 104
Command Set (Subcommand) .............................................................................................. 105
Check Power Mode Command (E5h/98h) ............................................................................ 107
Configure Stream Command (51h) ...................................................................................... 108
Device Configuration Overlay Command (B1h) .................................................................. 110
Device Configuration Overlay Features register values .................................................... 110
Device Configuration Overlay Data structure..................................................................... 112
DCO error information definition......................................................................................... 113
Download Microcode Command (92h) .................................................................................. 114
Execute Device Diagnostic Command (90h) ........................................................................ 116
Flush Cache Command (E7h) ............................................................................................... 117
Flush Cache Ext Command (EAh) ....................................................................................... 118
Format Track Command(50h) .............................................................................................. 119
Format Unit Command (F7h) ............................................................................................... 121
Identify Device Command (ECh) .......................................................................................... 122
Identify device information ................................................................................................... 123
Identify device information --Continued-- ........................................................................... 124
Identify device information --Continued— .......................................................................... 125
Identify device information --Continued— .......................................................................... 126
Identify device information --Continued— .......................................................................... 127
Identify device information --Continued— .......................................................................... 128
Identify device information --Continued— .......................................................................... 129
Identify device information --Continued— .......................................................................... 130
Identify device information --Continued— .......................................................................... 131
Identify device information --Continued— .......................................................................... 132
Idle Command (E3h/97h) ...................................................................................................... 133
Idle Immediate Command (E1h/95h) ................................................................................... 135
Initialize Device Parameters Command (91h) .................................................................... 136
Read Buffer Command (E4h)................................................................................................ 137
Read DMA Command (C8h/C9h).......................................................................................... 138
Read DMA Ext Command (25h) ........................................................................................... 140
Read FPDMA Queued Command (60h) ............................................................................... 142
Read Log Ext Command (2Fh) ............................................................................................. 144
Log Address Definition ........................................................................................................ 145
General Purpose Log Directory .......................................................................................... 146
Extended Comprehensive SMART Error Log ................................................................... 147
Extended Error log data structure ..................................................................................... 148
Command data structure .................................................................................................... 148
- Hitachi hard disk drive specifications –

Table 105
Table 106
Table 107
Table 108
Table 109
Table 110
Table 111
Table 112
Table 113
Table 114
Table 115
Table 116
Table 117
Table 118
Table 119
Table 120
Table 121
Table 122
Table 123
Table 124
Table 125
Table 126
Table 127
Table 128
Table 129
Table 130
Table 131
Table 132
Table 133
Table 134
Table 135
Table 136
Table 137
Table 138
Table 139
Table 140
Table 141
Table 142
Table 143
Table 144
Table 145
Table 146
Table 147
Table 148
Table 149
Table 150
Table 151
Table 152
Table 153
Table 154
Table 155
Table 156
Table 157
Table 158

Error data structure ............................................................................................................ 149
Extended Self-test log data structure ................................................................................ 150
Extended Self-test log descriptor entry ............................................................................. 151
Command Error information .............................................................................................. 152
Read Stream Error Log ....................................................................................................... 153
Stream Error Log entry ....................................................................................................... 154
Write Stream Error Log....................................................................................................... 155
Streaming Performance Parameters log ............................................................................ 156
Sector Time Array Entry (Linearly Interpolated) ............................................................. 156
Position Array Entry (Linearly Interpolated) .................................................................... 156
Access Time Array Entry (Linearly Interpolated) ............................................................. 156
Read Multiple Command (C4h) .......................................................................................... 157
Read Multiple Ext Command (29h).................................................................................... 158
Read Native Max ADDRESS (F8h) .................................................................................... 160
Read Native Max Address Ext (27h) .................................................................................. 161
Read Sector(s) Command (20h/21h) ................................................................................... 163
Read Sector(s) Ext Command (24h) ................................................................................... 165
Read Stream DMA Command (2Ah) .................................................................................. 167
Read Stream PIO Command (2Bh) .................................................................................... 170
Read Verify Sector(s) Command (40h/41h)........................................................................ 173
Read Verify Sector(s) Ext Command (42h) ........................................................................ 175
Recalibrate Command (1xh) ............................................................................................... 177
Security Disable Password Command (F6h) ..................................................................... 178
Password Information for Security Disable Password command .................................... 179
Security Erase Prepare Command (F3h) ........................................................................... 180
Security Erase Unit Command (F4h) ................................................................................ 181
Erase Unit Information ....................................................................................................... 182
Security Freeze Lock Command (F5h) ............................................................................... 183
Security Set Password Command (F1h) ............................................................................ 184
Security Set Password Information ................................................................................... 185
Security Unlock Command (F2h) ....................................................................................... 186
Security Unlock Information .............................................................................................. 187
Seek Command (7xh)........................................................................................................... 188
Sense Condition command (F0h) ........................................................................................ 189
Set Features Command (EFh) ............................................................................................ 190
Set Max ADDRESS (F9h) ................................................................................................... 194
Set Max set Password ......................................................................................................... 196
Set Max Set Password data contents ................................................................................. 196
Set Max Lock........................................................................................................................ 197
Set Max Unlock (F9h) ......................................................................................................... 198
Set Max Freeze Lock (F9h) ................................................................................................. 199
Set Max Address Ext Command (37h) ............................................................................... 200
Set Multiple Command (C6h) ............................................................................................. 202
Sleep Command (E6h/99h) ................................................................................................. 203
SMART Function Set Command (B0h) .............................................................................. 204
Log sector addresses ............................................................................................................ 207
Device Attribute Data Structure ........................................................................................ 209
Individual Attribute Data Structure.................................................................................. 210
Device Attribute Thresholds Data Structure .................................................................... 214
Individual Threshold Data Structure ................................................................................ 214
SMART Log Directory ......................................................................................................... 215
SMART summary error log sector...................................................................................... 216
Error log data structure ...................................................................................................... 217
Command data structure .................................................................................................... 217
- Hitachi hard disk drive specifications –

Table 159
Table 160
Table 161
Table 162
Table 163
Table 164
Table 165
Table 166
Table 167
Table 168
Table 169
Table 170
Table 171
Table 172
Table 173
Table 174
Table 175
Table 176
Table 177
Table 178
Table 179
Table 180
Table 181

Error data structure ............................................................................................................ 218
Self-test log data structure ................................................................................................. 219
Selective self-test log data structure .................................................................................. 220
Selective self-test feature flags ........................................................................................... 220
SMART Error Codes ............................................................................................................ 221
Standby Command (E2h/96h)............................................................................................. 222
Standby Immediate Command (E0h/94h) ......................................................................... 224
Write Buffer Command (E8h)............................................................................................. 225
Write DMA Command (Cah/CBh) ...................................................................................... 226
Write DMA FUA Ext Command (3Dh) .............................................................................. 228
Write DMA Ext Command (35h) ........................................................................................ 230
Write FPDMA Queued Command (61h) ............................................................................ 232
Write Log Ext Command (3Fh) .......................................................................................... 234
Write Multiple Command (C5h) ......................................................................................... 236
Write Multiple Ext Command (39h) .................................................................................. 238
Write Multiple FUA Ext Command (CEh) ........................................................................ 240
Write Sector(s) Command (30h/31h) .................................................................................. 242
Write Sector(s) Ext Command (34h) .................................................................................. 244
Write Stream DMA Command (3Ah) ................................................................................. 246
Write Stream PIO Command (3Bh) ................................................................................... 249
Write Uncorrectable Ext Command (45h) ......................................................................... 252
Timeout Values .................................................................................................................... 254
Timeout Values --Continued-- ............................................................................................ 255

List of figures
Figure 1 PList physical format ..................................................................................................................... 23
Figure 2 Connector location (2 disk model shown) ........................................................................................ 24
Figure 3 the timing of COMRESET, COMINIT and COMWAKE .................................................................. 27
Figure 4 Limits of temperature and humidity................................................................................................. 29
Figure 5 Top and side views with breather hole location and mechanical dimensions ....................................... 34
Figure 6 1D model Top and side views with breather hole location and mechanical dimensions ........................ 35
Figure 7 Bottom and side views with mounting hole locations ........................................................................ 36
Figure 8 Mounting hole locations (all dimensions are in mm) ......................................................................... 37
Figure 9 Connector locations ....................................................................................................................... 38
Figure 10 Initial Setting ......................................................................................................................... 62
Figure 11 Usual Operation ..................................................................................................................... 63
Figure 12 Password Lost ........................................................................................................................ 64

- Hitachi hard disk drive specifications –

General

1.1

Introduction

This document describes the specifications of the Deskstar 7K1000.C, CinemaStar 7K1000.C and Ultrastar
A7K2000, an Hitachi Global Storage Technologies 3.5-inch 7200-rpm serial-ATA interface hard disk drive with the
following model numbers:

Capacity

Type

160GB

DS7SAC160

250GB

DS7SAC250

320GB

DS7SAC320

8MB
16MB

DS7SAC500

8MB
16MB

500GB

DS7SAC101
640GB
750GB

1TB

DS7SAC640
DS7SAC750
DS7SAC100
DS7SAC101

Cache
8MB
8MB

32MB
32MB
32MB
32MB

Deskstar
HDS721016CLA382
HDS721016CLA682
HDS721025CLA382
HDS721025CLA682

Model#
Ultrastar

CinemaStar
HCS721016CLA382
HCS721025CLA382
HCS721032CLA382

HDS721032CLA362
HDS721032CLA662
HCS721050CLA382
HDS721050CLA362
HDS721050CLA662
HUA722050CLA330/1
HDS721064CLA332
HDS721064CLA632
HDS721075CLA332
HDS721075CLA632
HDS721010CLA332
HDS721010CLA632

32MB

HCS721075CLA332
HCS721010CLA332
HUA722010CLA330/1

Table 1 Type and Model#

- Hitachi hard disk drive specifications –

1.2

Glossary
ESD
Kbpi
Ktpi
Gbps
Mbps
MB/s
TB
GB
MB
KB
S.M.A.R.T.
DFT
ADM

1.3

Electrostatic Discharge
1,000 bits per inch
1,000 tracks per inch
1,000,000,000 bits per second
1,000,000 bits per second
1,000,000 bytes per second
1,000,000,000,000 bytes (for Drive Capacity)
1,000,000,000 bytes(for Drive Capacity)
1,048,576 bytes (for Memory Size)
1,024 bytes (for Memory Size)
Self-Monitoring Analysis and Reporting Technology
Drive Fitness Test
Automatic Drive Maintenance

General caution

The drive can be damaged by shock or ESD (Electrostatic Discharge). Any damage sustained by the drive after
removal from the shipping package and opening the ESD protective bag are the responsibility of the user.

1.4

References

・ Serial ATA II: Extensions to Serial ATA 1.0
・ Serial ATA International Organization: Serial ATA Revision 2.60

- Hitachi hard disk drive specifications –

General features
Data capacities of 160 GB – 1 TB
Spindle speeds of 7200 RPM
Fluid Dynamic Bearing motor
Serial ATA interface
Sector format of 512 bytes/sector
Closed-loop actuator servo
Load/Unload mechanism, non head disk contact start/stop
Automatic Actuator lock
Interleave factor 1:1
Seek time of 14 ms(1Disk model) / 8.5 ms(2Disk model) typical without Command Overhead
Sector Buffer size of 8, 16 or 32 MB
(Upper 2024KB(8MB) / 2272.5KB(16MB)/ 2768.5KB(32MB) are used for firmware)
Ring buffer implementation
Write Cache
Native command queuing support
Advanced ECC On The Fly (EOF)
Automatic Error Recovery procedures for read and write commands
Self Diagnostics on Power on and resident diagnostics
Serial ATA Data Transfer

3Gbps / 6Gbps

CHS and LBA mode
Power saving modes/Low RPM idle mode (APM)
S.M.A.R.T. (Self Monitoring and Analysis Reporting Technology)
Support security feature
Quiet Seek mode
48 bit addressing feature
Adaptive Zone Formatting
RVS(Rotational Vibration Safeguard) (32MB cache model only)
SATA 2.6 compliant
Support bulk encryption(specific pn only)

- Hitachi hard disk drive specifications –

Part 1. Functional specification

- Hitachi hard disk drive specifications –

Fixed disk subsystem description

3.1

Control Electronics

The drive is electronically controlled by a microprocessor, several logic modules, digital/analog modules, and
various drivers and receivers. The control electronics performs the following major functions:
Controls and interprets all interface signals between the host controller and the drive.
Controls read write accessing of the disk media, including defect management and error recovery.
Controls starting, stopping, and monitoring of the spindle.
Conducts a power-up sequence and calibrates the servo.
Analyzes servo signals to provide closed loop control. These include position error signal and estimated
velocity.
Monitors the actuator position and determines the target track for a seek operation.
Controls the voice coil motor driver to align the actuator in a desired position.
Constantly monitors error conditions of the servo and takes corresponding action if an error occurs.
Monitors various timers such as head settle and servo failure.
Performs self-checkout (diagnostics).

3.2

Head disk assembly

The head disk assembly (HDA) is assembled in a clean room environment and contains the disks and actuator
assembly. Air is constantly circulated and filtered when the drive is operational. Venting of the HDA is accomplished
via a breather filter.
The spindle is driven directly by an in-hub, brushless, sensorless DC drive motor. Dynamic braking is used to quickly
stop the spindle.

3.3

Actuator

The read/write heads are mounted in the actuator. The actuator is a swing-arm assembly driven by a voice coil
motor. A closed-loop positioning servo controls the movement of the actuator. An embedded servo pattern supplies
feedback to the positioning servo to keep the read/write heads centered over the desired track.
The actuator assembly is balanced to allow vertical or horizontal mounting without adjustment.
When the drive is powered off, the actuator automatically moves the head to the actuator ramp outside of the disk
where it parks.

- Hitachi hard disk drive specifications –

Drive characteristics

This section describes the characteristics of the drive.

4.1

Default logical drive parameters

The default of the logical drive parameters in Identify Device data is as shown below.
Description
Physical Layout
Label capacity (GB)
Bytes per Sector
Number of Heads
Number of Disks
2
Logical Layout
Number of Heads
Number of Sectors/ Track
1
Number of Cylinders
Number of Sectors
Total Logical Data Bytes

160GB model

250GB model

160
512
1
1

250
512
1
1

16
63
16,383
312,581,808
160,041,885,696

16
63
16,383
488,397,168
250,059,350,016

320GB model

500GB model

320
512
2
1

500
512
2 or 4
1 or 2

16
63
16,383
625,142,448
320,072,933,376

16
63
16,383
976,773,168
500,107,862,016

Table 2 Formatted capacity
Description
Physical Layout
Label capacity (GB)
Bytes per Sector
Number of Heads
Number of Disks
2
Logical Layout
Number of Heads
Number of Sectors/ Track
1
Number of Cylinders
Number of Sectors
Total Logical Data Bytes

Table 3 Formatted capacity --Continued-Description
Physical Layout
Label capacity (GB)
Bytes per Sector
Number of Heads
Number of Disks
2
Logical Layout
Number of Heads
Number of Sectors/ Track
1
Number of Cylinders
Number of Sectors
Total Logical Data Bytes

640GB model

750GB model

640
512
3
2

750
512
3 or 4
2

16
63
16,383
1.250,263,728
640,135,028,736

16
63
16,383
1,465,149,168
750,156,374,016

Table 4 Formatted capacity --Continued--

- Hitachi hard disk drive specifications –

Description
Physical Layout
Label capacity (GB)
Bytes per Sector
Number of Heads
Number of Disks
2
Logical Layout
Number of Heads
Number of Sectors/ Track
1
Number of Cylinders
Number of Sectors
Total Logical Data Bytes

1TB model
1000
512
4
2
16
63
16,383
1,953,525,168
1,000,204,886,016

Table 5 Formatted capacity --Continued-Notes: 1 Number of cylinders: For drives with capacities greater an 8.45 GB the IDENTIFY DEVICE information word
limits the number of cylinders to 16,383 per the ATA specification.
2

Logical layout: Logical layout is an imaginary drive parameter (that is, the number of heads) which is used to
access the drive from the system interface. The Logical layout to Physical layout (that is, the actual Head and
Sectors) translation is done automatically in the drive. The default setting can be obtained by issuing an IDENTIFY
DEVICE command

- Hitachi hard disk drive specifications –

4.2

Data sheet
Description

Max Data transfer rate (Mbps)

160GB
Model

250GB
Model

320GB
Model

500GB
Model

640GB
Model

750GB
3HD
Model

750GB
4HD
Model

1TB
Model

1484

1546

1484

1546

1484

1546

1484

1546

32MB

1368

1429

Interface transfer rate (MB/s)
Data buffer size

8MB

1368

1429

227

245

227

245

227

245

227

245

311

350

311

350

311

350

311

350

Rotational speed (RPM)
Number of buffer segments (read)
Number of buffer segments (write)
Recording density- max (Kbpi)
Track density (Ktpi)
2

Areal density - max (Gbits/in )

300(SATA) 600(SATA)
8MB
8MB
32MB
32MB
16MB
16MB
32MB
7,200
up to 128
up to 112
1368
1429
1368
1429

Number of data bands
1

Upper 2024KB(8MB) / 2272.5KB(16MB)/ 2768.5KB(32MB) are used for firmware

Table 6 Mechanical positioning performance

4.3

World Wide Name Assignment
Description of

Organization
Manufacturing Site
Product
OUI
SHBU Block Assignment
Port/Node ID

160GB
Model

250GB
Model

320GB
Model

500GB
640GB
750GB
Model
Model
Model
Hitachi GST
Hitachi GST China Plant, China(GSP)
Deskstar 7K1000.C/ CinemaStar 7K1000.C/ Ultrastar A7K2000
000CCAh
35Ah
35Bh
35Ch
11b

Table 7 World Wide Name Assignment

- Hitachi hard disk drive specifications –

1TB
Model

35Dh

4.4

Drive organization

4.4.1 Drive Format
Upon shipment from Hitachi Global Storage Technologies manufacturing the drive satisfies the sector continuity in
the physical format by means of the defect flagging strategy described in Section 5 on page 23 in order to provide
the maximum performance to users.

4.4.2 Cylinder allocation
Physical cylinder is calculated from the starting data track of 0. It is not relevant to logical CHS. Depending on the
capacity some of the inner zone cylinders are not allocated.
Data cylinder
This cylinder contains the user data which can be sent and retrieved via read/write commands and a spare area for
reassigned data.
Spare cylinder
The spare cylinder is used by Hitachi Global Storage Technologies manufacturing and includes data sent from a
defect location.

- Hitachi hard disk drive specifications –

4.5

Performance characteristics

Drive performance is characterized by the following parameters:
 Command overhead
 Mechanical positioning
Seek time
Latency
 Data transfer speed
 Buffering operation (Look ahead/Write cache)
All the above parameters contribute to drive performance. There are other parameters that contribute to the
performance of the actual system. This specification defines the characteristics of the drive, not the characteristics
of the system throughput which depends on the system and the application.

4.5.1 Command overhead
Command overhead is defined as the time required
from the time H->D Reg FIS w/ command bit is sent by host
to the time
PIO Set Up FIS is sent by device(PIO Read/Write)
DATA FIS is sent by device(DMA Read)
DMA Activate FIS is sent by device(DMA Write)
DMA Set Up FIS is sent by device(NCQ Read/Write)
Seek Start (Read cache not hit or Seek)
The table below gives average command overhead.

Command type

(Drive is in quiescent state)

Read (Cache not hit)
Read (Cache hit)
Write
Seek

Typical time (ms)

Typical time for NCQ
command (ms)

0.5
0.1
0.015
0.5

0.5
0.2
0.2
not applicable

Table 8 Command overhead

- Hitachi hard disk drive specifications –

4.5.2 Mechanical positioning
4.5.2.1

Average seek time (without command overhead, including settling)
Command Type

1 Disk model
Typical (ms)
Max (ms)
14.0
14.7
15.0
15.7
14.0
14.7
15.0
15.7

Read
Write
Read (Quiet Seek mode)
Write (Quiet Seek mode)

2 Disk model
Typical (ms)
Max (ms)
8.5
9.2
9.5
10.2
14.0
14.7
15.0
15.7

Table 9 Mechanical positioning performance
The terms “Typical” and “Max” are used throughout this specification with the following meanings:
Typical. The average of the drive population tested at nominal environmental and voltage conditions.
Max. The maximum value measured on any one drive over the full range of the environmental and voltage
conditions. (See Section 6.2, “Environment” on page 28 and Section 6.3, “DC Power Requirements” on
page 30.)
Seek time is measured from the start of the motion of the actuator to the start of a reliable read or write
operation. "Reliable read or write" implies that error correction/recovery is not used to correct arrival
problems. The average seek time is measured as the weighted average of all possible seek combinations.

max.
n=1

Weighted Average =

(max. + 1 – n) (Tnin + Tnout)

__________________________________________________

(max. + 1) (Tnin + Tnout)
where: max

= maximum seek length
n
= seek length (1 to max)
Tnin = inward measured seek time for an n-track seek
Tnout = outward measured seek time for an n-track seek

- Hitachi hard disk drive specifications –

4.5.2.2

Single track seek time (without command overhead, including settling)

Common to all models and all seek modes
Function
Typical (ms)
Read
0.8
Write
1.3

Max (ms)
1.5
2.0

Table 10 Single Track Seek Time

Single track seek is measured as the average of one (1) single track seek from every track with a random head
switch in both directions (inward and outward).

4.5.2.3

Average latency

Rotational speed
7200 RPM

Time for a revolution
(ms)
8.3

Average latency
(ms)
4.17

Table 11 Latency Time

4.5.3

Drive ready time
Power on to ready
1D model
2D model

Typical (sec)
8
10

Maximum (sec)
20
20

Table 12 Drive ready time

Ready

The condition in which the drive is able to perform a media access command (such as
read, write) immediately.

Power on

This includes the time required for the internal self diagnostics.

- Hitachi hard disk drive specifications –

4.5.4 Operating modes
4.5.4.1

Operating mode descriptions

Operating mode
Spin-up

Description
Start up time period from spindle stop or power down

Seek

Seek operation mode

Write

Write operation mode

Read

Read operation mode

Unload Idle

Spindle rotation at 7200 RPM with heads unloaded

Idle

Spindle motor and servo system are working normally.
and processed immediately

Commands can be received

Standby

Actuator is unloaded and spindle motor is stopped.
immediately

Commands can be received

Sleep

Actuator is unloaded and spindle motor is stopped.
change the mode to standby

Only soft reset or COMRESET can

Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the OD parking position.

4.5.4.2

Mode transition times

Mode transition times are shown below.

From

RPM

Typical Transition
time(sec)

Max Transition
time(sec)

Standby

Idle

0 -> 7200

8 (1Disk model)
10 (2Disk model))

Idle

Standby

7200 -> 0

Immediately

Standby

Sleep

Immediately

Sleep

Standby

Immediately

Unload idle

Idle

7,200

0.7

Idle

Unload Idle

7,200

0.7

Low RPM Idle

Idle

4500 -> 7200

3 (1 Disk model)
4 (2 Disk model)

Note: The command is processed immediately but there will be an actual spin down time reflecting the seconds
passed until the spindle motor stops.
Note: Low rpm idle mode is supported on specific drive PN, only.

Table 13 Mode transition times

- Hitachi hard disk drive specifications –

Defect flagging strategy

Media defects are remapped to the next available sector during the Format Process in manufacturing. The mapping
from LBA to the physical locations is calculated by an internally maintained table.
Shipped format
Data areas are optimally used.
No extra sector is wasted as a spare throughout user data areas.
All pushes generated by defects are absorbed by the spare tracks of the inner zone.

N+1 defect

N+2 defect

N+3

skip

Figure 1 PList physical format
Defects are skipped without any constraint, such as track or cylinder boundary.
physical is done automatically by internal table.

- Hitachi hard disk drive specifications –

The calculation from LBA to

Specification

6.1 Electrical interface
6.1.1

Connector location

Refer to the following illustration to see the location of the connectors.

SATA

Figure 2

6.1.1.1

Connector location (2 disk model shown)

signal connector

The SATA signal connector is a 8-pin connector. Power connector is a 15-pin connector.

Hitachi hard disk drive specifications
24

6.1.2

Signal definition

SATA has receivers and drivers to be connected to Tx+/- and Rx +/- Serial data signal.
Defines the signal names of I/O connector pin and signal name.

Signal

Power

No.
S1
S2
S3
S4
S5
S6
S7

GND
A+
AGnd
BB+
Gnd

P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15

V33
V33
V33
Gnd
Gnd
Gnd
V5
V5
V5
Gnd
Reserved
Gnd
V12
V12
V12

Plug Connector pin definition
2nd mate
Differential signal A from Phy
2nd mate
Differential signal B from Phy
2nd mate
Key and spacing separate signal and power segments
3.3V power
3.3V power
3.3V power, pre-charge, 2nd Mate
1st mate
2nd mate
2nd mate
5V power,pre-charge,2nd Mate
5V power
5V power
2nd mate
Support staggered spin-up and LED activity
1st mate
12V power,pre-chage,2nd mate
12V power
12V power

Signal
Gnd
RX+
RXGnd
TXTX+
Gnd

I/O
Input
Input
Output
Output

3.3V
3.3V
3.3V
Gnd
Gnd
Gnd
5V
5V
5V
Gnd
Reserve
Gnd
V12
V12
V12

Table 14 Interface connector pins and I/O signals

6.1.2.1

TX+ / TX-

These signal are the outbound high-speed differrential signals that are connected to the serial ATA cable

6.1.2.2

RX+ / RX-

These signals are the inbound high-speed differential signals that are connected to the serial ATA cable.
The following standard shall be referenced about signal specifications.
Serial ATA: High Speed Serialized AT Attachment Revision 2.6 15-Feb-2007

Hitachi hard disk drive specifications
25

6.1.2.3

5V PRECHARGE

+5 Vdc power that is available on the extended pins. This is used for pre-charging the I/O module.
The enclosure shall provide for a current limit of 4.5 A peak on each 5V pre-charge pin (R=1.1 Ohms).These
signals are the inbound high-speed differential signals that are connected to the serial ATA cable.

6.1.2.4

12V PRECHARGE

+12 Vdc power that is available on the extended pins. This is used for pre-charging the 12V circuitry in the I/O
Option slot module.
The enclosure shall be capable of supplying 2.4 A peak on each 12 V pre-charge pin (R=5 Ohms).+5 Vdc power
that is available on the extended pins. This is used for pre-charging the I/O module.
The enclosure shall provide for a current limit of 4.5 A peak on each 5V pre-charge pin (R=1.1 Ohms).These
signals are the inbound high-speed differential signals that are connected to the serial ATA cable.

Hitachi hard disk drive specifications
26

6.1.3

Out of band signaling(SATA)
t1

C O M R ESET/C O M IN IT

C O M W A KE

Figure 3

t1
t2
t3
t4

the timing of COMRESET, COMINIT and COMWAKE

PARAMETER DESCRIPTION
ALINE primitives
Spacing
ALIGN primitives
Psacing

Table 15 Parameter descriptions

Hitachi hard disk drive specifications
27

Nominal (ns)
106.7
320
106.7
106.7

6.2 Environment
6.2.1

Temperature and humidity

Operating conditions
Temperature

CinemaStar : 0 to 70°C (See notes)
Deskstar/Ultrastar : 0 to 60°C (See notes)
8 to 90% non-condensing
29.4°C non-condensing
20°C/Hour
–300 to 3,048 m

Relative humidity
Maximum wet bulb temperature
Maximum temperature gradient
Altitude
Non-Op conditions
Temperature
Relative humidity
Maximum wet bulb temperature

-40 to 70°C
5 to 95% non-condensing
35°C non-condensing

Maximum temperature gradient

30°C/Hour

Altitude

–300 to 12,000 m

Table 16 Temperature and humidity
Notes:
1.

CinemaStar : Temperature tested at the top cover (AV streaming application usage)
Deskstar/Ultrastar : The system is responsible for providing sufficient ventilation to maintain a surface
temperature below 65°C at the center of the top cover of the drive.
2. Non condensing conditions should be maintained at any time.
3. Maximum storage period within shipping package is one year,

Hitachi hard disk drive specifications
28

Figure 4 Limits of temperature and humidity
Note:

6.2.2

Storage temperature range is 0 to 70°C

Corrosion test

The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being
subjected to seven days at 50°C with 90% relative humidity.

6.2.3

Atmospheric condition

Environments that contain elevated levels of corrosives (e.g. hydrogen sulfide, sulfur oxides, or hydrochloric
acid) should be avoided. Care must be taken to avoid using any compound/material in a way that creates an
elevated level of corrosive materials in the atmosphere surrounding the disk drive. Care must also be taken to
avoid use of any organometallic (e.g. organosilicon or organotin) compound/material in a way that creates
elevated vapor levels of these compounds/materials in the atmosphere surrounding the disk drive.

Hitachi hard disk drive specifications
29

6.3 DC power requirements
Damage to the drive electronics may result if the power supply cable is connected or disconnected to the legacy
Power connector while power is being applied to the drive (no hot plug/unplug is allowed). If SATA power supply
cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed.

6.3.1

Input voltage

During run and spin up

+5 Volts Supply
+12 Volts Supply

5V ± 5%
12V ±10%

Absolute max
spike voltage
–0.3 to 5.5V
–0.3 to 15.0V

Supply rise time
0 to 5sec
0 to 5sec

Table 17 Input voltage
Caution : To avoid damage to the drive electronics, power supply voltage spikes must not exceed
specifications.

6.3.2

Power supply current (typical)

Power supply current of
2 Disk model
(values in milliamps. RMS)
Idle average
Idle ripple (peak-to-peak)

+5 Volts [mA]

+12 Volts [mA]

Pop Mean
230
200

Pop Mean
270
400

Low RPM idle

170

100

Low RPM idle ripple

100

250

Unload idle average
Unload idle ripple
1
Random R/W average

170
100
330

Random R/W peak
Random R/W average(Quiet Seek)
Random R/W peak(Quiet Seek)
Start up (max)
Standby average
Sleep average

1100
350
1100
1100
160
160

250
300
560
(580) *1
1700
330
1500
1800
7
7

Table 18 Power supply current of 2 Disk model
*1 : for Ultrastar only

Except for a peak of less than 100 s duration
1
Random R/W : 35 IOPS / 16 Blocks Random Write and Random Read

Hitachi hard disk drive specifications
30

Total
[W]
4.4
2.1
3.9
8.4
(8.6) *1
5.7

0.9
0.9

Power supply current of
1 Disk models
(values in milliamps. RMS)
Idle average
Idle ripple (peak-to-peak)

+5 Volts [mA]

+12 Volts [mA]

Pop Mean
220
200

Pop Mean
210
300

Low RPM Idle
Low RPM Idle Ripple

160
100

90
250

Unload Idle average
Unload Idle Ripple
1
Random R/W average (Quiet Seek)
Random R/W peak(Quiet Seek)
Start up (max)
Standby average
Sleep average

160
100
350
1100
1100
160
160

200
300
400
1200
1900
7
7

Total
[W]
3.6
1.9
3.2
6.6

0.9
0.9

Table 19 Power supply current of 1 Disk model

Random R/W : 35 IOPS / 16 Blocks Random Write and Random Read

6.3.3

Power supply generated ripple at drive power connector
+5V DC
+12V DC

Maximum (mV pp)
200
250

MHz
0-10
0-10

Table 20 Power supply generated ripple at drive power connector

During drive start up and seeking 12-volt ripple is generated by the drive (referred to as dynamic loading). If the
power of several drives is daisy chained together, the power supply ripple plus the dynamic loading of the other
drives must remain within the above regulation tolerance. A common supply with separate power leads to each
drive is a more desirable method of power distribution.
To prevent external electrical noise from interfering with the performance of the drive, the drive must be held by
four screws in a user system frame which has no electrical level difference at the four screws position and has
less than ±300 millivolts peak to peak level difference to the ground of the drive power connector.

Hitachi hard disk drive specifications
31

6.4 Reliability
6.4.1

Data integrity

No more than one sector is lost at Power loss condition during the write operation when the write cache option is
disabled. If the write cache option is active, the data in write cache will be lost. To prevent the loss of customer
data, it is recommended that the last write access before power off be issued after setting the write cache off.

6.4.2

Cable noise interference

To avoid any degradation of performance throughput or error rate when the interface cable is routed on top or
comes in contact with the HDA assembly, the drive must be grounded electrically to the system frame by four
screws. The common mode noise or voltage level difference between the system frame and power cable ground
or AT interface cable ground should be in the allowable level specified in the power requirement section.

6.4.3

Load/Unload

The product supports a minimum of 300,000 normal load/unloads in a 40° C environment.
Load/unload is invoked by transition of the HDD's power mode.
Idle <-> unload idle
Idle <-> Low rpm idle*
*Note: Low rpm idle mode is supported on specific drive PN, only.

6.4.4

Start/stop cycles

The drive withstands a minimum of 50,000 start/stop cycles in a 40° C environment and a minimum of 10,000
start/stop cycles in extreme temperature or humidity within the operating range. .

6.4.5

Preventive maintenance

None

6.4.6

Data reliability

Probability of not recovering data is 1 in 10
Ultrastar model.

bits read for Deskstar/CinemaStar models, 1 in 10

bits read for

ECC On The Fly correction
 1 Symbol : 10 bits
 No Interleave
 34 symbol ECC
 This implementation always recovers 16 random errors and a 310-bit continuous burst error

Hitachi hard disk drive specifications
32

6.4.7

Required Power-Off Sequence

The required BIOS sequence for removing power from the drive is as follows:
Step 1: Issue one of the following commands.
Standby
Standby immediate
Sleep
Note: Do not use the Flush Cache command for the power off sequence because this command does not
invoke Unload
Step 2: Wait until the Command Complete status is returned. In a typical case 350 ms are required for the
command to finish completion; however, the BIOS time out value needs to be 30 seconds considering error
recovery time.
Step 3: Terminate power to HDD.

Hitachi hard disk drive specifications
33

6.5 Mechanical specifications
6.5.1

Physical dimensions

Figure 5 Top and side views with breather hole location and mechanical dimensions

Hitachi hard disk drive specifications
34

Figure 6

1D model Top and side views with breather hole location and mechanical dimensions

All dimensions are in millimeters.

Hitachi hard disk drive specifications
35

Figure 7 Bottom and side views with mounting hole locations
All dimensions in the above figure are in millimeters.
The breather hole must be kept uncovered in order to keep the air pressure inside of the disk enclosure equal to
external air pressure.

Hitachi hard disk drive specifications
36

The following table shows the physical dimensions of the drive.

Height (mm)

Width (mm)

Length (mm)

26.1 MAX

101.6 ± 0.25

147 MAX

Weight (grams)
1 Disk model
400 MAX

Weight (grams)
2 Disk model
680 MAX

Table 21 Physical Dimensions

6.5.2

Hole locations

The mounting hole location and size for the hard disk drive is shown below.

(4)

(6X) Max. penetration 4.5 mm

Side View
(6)

(7)

(5)
I/F Connector

(3)

Bottom View

(2)

(4X) Max. penetration 4.0 mm

(1)

Thread

(1)

(2)

(3)

(4)

(5)

(6)

(7)

6-32UNC

41.28±0.5

44.45±0.2

95.25±0.2

6.35±0.2

28.5±0.5

60.0±0.2

41.6±0.2

Figure 8 Mounting hole locations (all dimensions are in mm)

Hitachi hard disk drive specifications
37

6.5.3

Connector locations

Figure 9

Connector locations

Hitachi hard disk drive specifications
38

6.5.4

Drive mounting

The drive will operate in all axes (6 directions). Performance and error rate will stay within specification limits if
the drive is operated in the other orientations from which it was formatted.
For reliable operation, the drive must be mounted in the system securely enough to prevent excessive motion or
vibration of the drive during seek operation or spindle rotation, using appropriate screws or equivalent mounting
hardware.
The recommended mounting screw torque is 0.6 - 1.0 Nm (6-10 Kgf.cm).
The recommended mounting screw depth is 4 mm maximum for bottom and 4.5 mm maximum for horizontal
mounting.
Drive level vibration test and shock test are to be conducted with the drive mounted to the table using the bottom
four screws.

6.5.5

Heads unload and actuator lock

Heads are moved out from disks (unload) to protect the disk data during shipping, moving, or storage. Upon
power down, the heads are automatically unloaded from disk area and the locking mechanism of the head
actuator will secure the heads in unload position.

Hitachi hard disk drive specifications
39

6.6 Vibration and shock
All vibration and shock measurements recorded in this section are made with a drive that has no mounting
attachments for the systems. The input power for the measurements is applied to the normal drive mounting
points.

6.6.1

Operating vibration

6.6.1.1

Random vibration (Linear)

The test is 30 minutes of random vibration using the power spectral density (PSD) levels shown below in each of
three mutually perpendicular axes. The disk drive will operate without non-recoverable errors when subjected to
the above random vibration levels.

Frequency

5 Hz

17 Hz

45 Hz

48 Hz

62 Hz

65 Hz

150 Hz

200 Hz

500 Hz

RMS
(G)

0.02

1.1

8.0

1.0

0.5

0.67

–3

x10
2
[G /Hz]

Table 22 Random vibration PSD profile break points (operating)

The overall RMS (root mean square) level is 0.67 G.

6.6.1.2

Swept sine vibration (Linear)

The drive will meet the criteria shown below while operating in the specified conditions:
 No errors occur with 0.5 G 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with 3-minute
dwells at two major resonances
 No data loss occurs with 1 G 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with 3-minute
dwells at two major resonances

6.6.1.3

Random vibration (Rotational)

The drive will meet the criteria shown below while operating in the specified conditions:
 Less than 20% Performance degradation for Random Write/Read/Verify @12.5Rad/sec^2(’10-300Hz
Flat)

Hitachi hard disk drive specifications
40

6.6.2

Nonoperating vibration

The drive does not sustain permanent damage or loss of previously recorded data after being subjected to the
environment described below

6.6.2.1

Random vibration

The test consists of a random vibration applied for each of three mutually perpendicular axes with the time
duration of 10 minutes per axis. The PSD levels for the test simulate the shipping and relocation environment
shown below. The overall RMS (Root Mean Square) level of vibration is 1.04 G.
Frequency

2 Hz

4 Hz

8 Hz

40 Hz

55 Hz

70 Hz

200 Hz

G2/Hz

0.001

0.03

0.003

0.01

0.001

Table 23 Random vibration PSD profile break points (nonoperating)

6.6.2.2

Swept sine vibration

 2 G (Zero to peak), 5 to 500 to 5 Hz sine wave
 0.5 oct/min sweep rate
 3 minutes dwell at two major resonances

6.6.3

Operating shock

The drive meets the following criteria while operating in the conditions described below. The shock test consists
of 10 shock inputs in each axis and direction for total of 60. There must be a delay between shock pulses long
enough to allow the drive to complete all necessary error recovery procedures.
 No error occurs with a 10 G half-sine shock pulse of 11 ms duration in all models.
 No data loss occurs with a 30 G half-sine shock pulse of 4 ms duration in all models.
 No data loss occurs with a 70 G half-sine shock pulse of 2 ms duration.

Hitachi hard disk drive specifications
41

6.6.4

Nonoperating shock

The drive will operate with no degradation of performance after being subjected to shock pulses with the
following characteristics.

6.6.4.1

Trapezoidal shock wave

 Approximate square (trapezoidal) pulse shape
 Approximate rise and fall time of pulse is1 ms
 Average acceleration level is 50 G. (Average response curve value during the time following the 1 ms rise
time and before the 1 ms fall with a time "duration of 11 ms")
 Minimum velocity change is 4.23 meters/second

6.6.4.2

Sinusoidal shock wave

The shape is approximately half-sine pulse.
duration.

Models
1D/2D models
All models

The figure below shows the maximum acceleration level and

Accleration level (G)
350
150

Duration (ms)
2
11

Table 24 Sinusoidal shock wave

6.6.5

Nonoperating Rotational shock

All shock inputs shall be applied around the actuator pivot axis.

Duration
1 ms
2 ms

Rad/sec
30,000
20,000

Table 25 Rotational Shock

Hitachi hard disk drive specifications
42

6.7 Acoustics
The upper limit criteria of the octave sound power levels are given in Bels relative to one picowatt and are shown
in the following table. The sound power emission levels are measured in accordance with ISO 7779.

Typical / Max

Mode

1 disk model

2 disk model

2.5 / 2.7

2.4 / 2.5

Performance seek mode

N/A

2.9/ 3.1

Quiet seek mode

2.7 / 3.0

2.5 / 2.7

Idle
Operating

Table 26 Sound power levels

Mode definition:
Idle mode. The drive is powered on, disks spinning, track following, unit ready to receive and respond to
interface commands.
Operating mode. Continuous random cylinder selection and seek operation of the actuator with a dwell
time at each cylinder. The seek rate for the drive is to be calculated as shown below:


Dwell time = 0.5 x 60/RPM



Seek rate = 0.4 / (Average seek time + Dwell time)

6.8 Identification labels
The following labels are affixed to every drive shipped from the drive manufacturing location in accordance with
the appropriate hard disk drive assembly drawing:

A label containing the Hitachi logo, the Hitachi Global Storage Technologies part number, and the
statement
“Made by Hitachi Global Storage Technologies Inc.” or Hitachi Global Storage
Technologies approved
equivalent

A label containing the drive model number, the manufacturing date code, the formatted capacity, the
place
of manufacture, UL/CSA/TUV/CE/C-Tick mark logos

A bar code label containing the drive serial number

A label containing the jumper pin description

A user designed label per agreement
The above labels may be integrated with other labels.

Hitachi hard disk drive specifications
43

6.9 Safety
6.9.1

UL and CSA standard conformity

The product is qualified per UL60950-1：2005 Second Edition and CAN/CSA-C22.2 No.60950-1-07 Second
Edition, for use in Information Technology Equipment including Electric Business Equipment.
The UL recognition or the CSA certification is maintained for the product life.
The UL and C-UL recognition mark or the CSA monogram for CSA certification appear on the drive.

6.9.2

German Safety Mark

The product is approved by TUV on Test requirement: EN 60950-1:2006+A11 but the GS mark is not
applicable to internal devices such as this product.

6.9.3

Flammability

The printed circuit boards used in this product are made of material with the UL recognized flammability rating of
V-1 or better. The flammability rating is marked or etched on the board. All other parts not considered electrical
components are made of material with the UL recognized flammability rating of V-2 minimum basically.

6.9.4

Safe handling

The product is conditioned for safe handling in regards to sharp edges and corners.

6.9.5

Substance restriction requirements

The product complies with the Directive 2002/95/EC of the European Parliament on the restrictions of the use of
the certain hazardous substances in electrical and electronic equipment (RoHS).

6.9.6

Secondary circuit protection

Spindle/VCM driver module includes 12 V over current protection circuit.

Hitachi hard disk drive specifications
44

6.10 Electromagnetic compatibility
When installed in a suitable enclosure and exercised with a random accessing routine at maximum data rate,
the drive meets the following worldwide EMC requirements:
 United States Federal Communications Commission (FCC) Rules and Regulations (Class B), Part 15. (A
6 dB buffer shall be maintained on the emission requirements).
 European Economic Community (EEC) directive number 76/889 related to the control of radio frequency
interference and the Verband Deutscher Elektrotechniker (VDE) requirements of Germany
(GOP).Spectrum Management Agency (SMA) EMC requirements of Australia. The SMA has approved
two forms of C-Tick Marking for Hitachi Global Storage Technologies.

6.10.1

CE Mark

The product is declared to be in conformity with requirements of the following EC directives under the sole
responsibility of Hitachi Global Storage Technologies Japan Ltd:
Council Directive 2004/108/EC on the approximation of laws of the Member States relating to electromagnetic
compatibility.

6.10.2

C-Tick Mark

The product complies with the following Australian EMC standard:
Limits and methods of measurement of radio disturbance characteristics of information technology, AS/NZS
3548 : 1995 Class B.

6.10.3

BSMI Mark
The product complies with the Taiwan EMC standard “Limits and methods of measurement of radio
disturbance characteristics of information technology equipment, CNS 13438 Class B.”

6.10.4

KC Mark

The product complies with the Korea EMC standard. The regulation for certification of information and
communication equipment is based on “Telecommunications Basic Act” and “Radio Waves Act” Korea EMC
requirement are based technically on CISPR22 measurement standards and limits. KC standards are likewise
based on IEC standards.

Hitachi hard disk drive specifications
45

Part 2. Interface Specification

Hitachi hard disk drive specifications
46

General

7.1 Introduction
This specification describes the host interface of HDS7210xxCLA3yz / HUA7220xxCLA33z /
HCS5C10xxCLA382 / HCS7210xxCLA3y2 / HDS5C10xxCLA382
.
The interface conforms to the following working documents of Information technology with certain limitations
described in the chapter 0 “Deviations from Standard” on page 47
– Serial ATA II: Extensions to Serial ATA Revision 2.6

7.2 Terminology
Device
Host

HDS7210xxCLA3yz / HUA7220xxCLA33z /
HCS5C10xxCLA382 / HCS7210xxCLA3y2 / HDS5C10xxCLA382
Device indicates

Host indicates the system that the device is attached to.

7.3 Deviations From Standard
The device conforms to the referenced specifications, with deviations described below.
Check Power Mode

Check Power Mode command returns FFh to Sector Count Register when the
device is in Idle mode. This command does not support 80h as the return value .

COMRESET

COMRESET response is not the same as that of Power On Reset.
section 5.1, “Reset Response” for detail.

Refer to

Download

Download command is aborted when the device is in security locked mode.
COMRESET response time During 500ms from Power On Reset, COMINIT is not returned within 10ms as a
response to COMRESET.
Streaming Commands

When the device is in standby mode, Streaming Commands can‟t be completed
while waiting for the spindle to reach operating speed even if execution time
exceeds specified CCTL(Command Completion Time Limit). The minimum CCTL
is 50ms.CCTL is set to 50ms when the specified value is shorter than 50ms. For
HCS7210xxCLA3y2 and HCS5C10xxCLA382, the minimum CCTL is 100ms.

Error Recover Control
(SCT Command set)

When the device is in standby mode, any command where error recovery time
limit is specified can‟t be completed while waiting for the spindle to reach operating
speed even if execution time exceeds specified recovery time limit. The minimum
time limit is 6.5 second. When the specified time limit is shorter than 6.5 second,
the issued command is aborted. For HCS7210xxCLA3y2 and
HCS5C10xxCLA382, the minimum time limit is 0.3 second.

Hitachi hard disk drive specifications
47

Registers

In Serial ATA, the host adapter contains a set of registers that shadow the contents of the traditional device
registers, referred to as the Shadow Register Block. Shadow Register Block registers are interface registers
used for delivering commands to the device or posting status from the device. About details, please refer to the
Serial ATA Specification.
In the following cases, the host adapter sets the BSY bit in its shadow Status Register and transmits a FIS to the
device containing the new contents.
 Command register is written in the Shadow Register Block
 Device Control register is written in the Shadow Register Block with a change of state of the SRST bit
 COMRESET is requested

8.1 Alternate Status Register
Alternate Status Register
7

BSY

RDY

DSC
/SERV

DRQ

COR

IDX

ERR

Table 27 Alternate Status Register
This register contains the same information as the Status Register. The only difference is that reading this
register does not imply interrupt acknowledge or clear a pending interrupt. See 8.13 "Status Register" on the
page 53 for the definition of the bits in this register.

8.2 Command register
This register contains the command code being sent to the device. Command execution begins immediately
after this register is written. The command set is shown in Table 66 Command Set on page 103.
All other registers required for the command must be set up before writing the Command Register.

8.3 Cylinder High Register
This register contains the high order bits of the starting cylinder address for any disk access. At the end of the
command, this register is updated to reflect the current cylinder number.
In LBA Mode this register contains Bits 16-23. At the end of the command, this register is updated to reflect the
current LBA Bits 16-23.
The cylinder number may be from zero to the number of cylinders minus one.
When 48-bit addressing commands are used, the "most recently written" content contains LBA Bits 16-23, and
the "previous content" contains Bits 40-47. The 48-bit Address feature set is described in 9.12.

Hitachi hard disk drive specifications
48

8.4 Cylinder Low Register
This register contains the low order bits of the starting cylinder address for any disk access. At the end of the
command, this register is updated to reflect the current cylinder number.
In LBA Mode this register contains Bits 8-15. At the end of the command, this register is updated to reflect the
current LBA Bits 8-15.
The cylinder number may be from zero to the number of cylinders minus one.
When 48-bit addressing commands are used, the "most recently written" content contains LBA Bits 8-15, and
the "previous content" contains Bits 32-39.

8.5 Data Register
This register is used to transfer data blocks between the device data buffer and the host. It is also the register
through which sector information is transferred on a Format Track command, and configuration information is
transferred on an Identify Device command.
All data transfers are 16 bits wide, except for ECC byte transfers, which are 8 bits wide. Data transfers are PIO
only.
The register contains valid data only when DRQ=1 in the Status Register.

8.6 Device Control Register
Device Control Register

Table 28

HOB

SRST

-IEN

Device Control Register

Bit Definitions
HOB
SRST (RST)

HOB (high order byte) is defined by the 48-bit Address feature set. A write to
any Command Register shall clear the HOB bit to zero.
Software Reset. The device is held reset when RST=1. Setting RST=0
reenables the device.
The host must set RST=1 and wait for at least 5 microseconds before setting
RST=0, to ensure that the device recognizes the reset.

-IEN

Interrupt Enable. When -IEN=0, and the device is selected, device interrupts to
the host will be enabled. When -IEN=1, or the device is not selected, device
interrupts to the host will be disabled.

Hitachi hard disk drive specifications
49

8.7 Drive Address Register
Drive Address Register

Table 29

HIZ

-WTG

-H3

-H2

-H1

-H0

-DS1

-DS0

Drive Address Register

This register contains the inverted drive select and head select addresses of the currently selected drive.
Bit Definitions
HIZ

High Impedance. This bit is not driven and will always be in a high impedance state.

-WTG

-Write Gate. This bit is 0 when writing to the disk device is in progress.

-H3,-H2,-H1,-H0

-Head Select. These four bits are the one's complement of the binary coded address
of the currently selected head. -H0 is the least significant.

-DS1

-Drive Select 1. Drive select bit for device 1, active low. DS1=0 when device 1 (slave)
is selected and active.

-DS0

-Drive Select 0. Drive Select bit for device 0, active low. DS0=0 when device 0
(master) is selected and active.

8.8 Device/Head Register
Device/Head Register
7

DRV

HS3

HS2

HS1

HS0

Table 30 Device/Head Register
This register contains the device and head numbers.
Bit Definitions
L

Binary encoded address mode select. When L=0, addressing is by CHS mode. When
L=1, addressing is by LBA mode.

DRV

Device. This product ignores this bit.

HS3,HS2,HS1,HS0

Head Select. These four bits indicate binary encoded address of the head. HS0 is the
least significant bit. At command completion, these bits are updated to reflect the
currently selected head.
The head number may be from zero to the number of heads minus one.
In LBA mode, HS3 through HS0 contain bits 24-27 of the LBA. At command
completion, these bits are updated to reflect the current LBA bits 24-27.

Hitachi hard disk drive specifications
50

8.9 Error Register
Error Register
7

ICRCE

UNC

IDNF

ABRT

TK0NF

AMNF

Table 31 Error Register
This register contains status from the last command executed by the device, or a diagnostic code.
At the completion of any command except Execute Device Diagnostic, the contents of this register are valid
always even if ERR=0 in the Status Register.
Following a power on, a reset, or completion of an Execute Device Diagnostic command, this register contains a
diagnostic code. See 0 on page 55 for the definition.
Bit Definitions
ICRCE (CRC)

Interface CRC Error. ICRCE=1 indicates a CRC error occurred during FIS transmission or
FIS reception.

UNC

Uncorrectable Data Error. UNC=1 indicates an uncorrectable data error has been
encountered.

IDNF (IDN)

ID Not Found. IDN=1 indicates the requested sector's ID field could not be found.

ABRT (ABT)

Aborted Command. ABT=1 indicates the requested command has been aborted due to a
device status error or an invalid parameter in an output register.

TK0NF (T0N)

Track 0 Not Found. T0N=1 indicates track 0 was not found during a Recalibrate command.

AMNF (AMN)

Address Mark Not Found. This product does not report this error. This bit is always zero.

Hitachi hard disk drive specifications
51

8.10 Features Register
This register is command specific. This is used with the Set Features command, SMART Function Set command
and Format Unit command.

8.11 Sector Count Register
This register contains the number of sectors of data requested to be transferred on a read or write operation
between the host and the device. If the value in the register is set to 0, a count of 256 sectors (in 28-bit
addressing) or 65,536 sectors (in 48-bit addressing) is specified.
If the register is zero at command completion, the command was successful. If not successfully completed, the
register contains the number of sectors which need to be transferred in order to complete the request.
The contents of the register are defined otherwise on some commands. These definitions are given in the
command descriptions.

8.12 Sector Number Register
This register contains the starting sector number for any disk data access for the subsequent command.
The sector number is from one to the maximum number of sectors per track.
In LBA mode, this register contains Bits 0-7. At the end of the command, this register is updated to reflect the
current LBA Bits 0-7.
When 48-bit commands are used, the "most recently written" content contains LBA Bits 0-7, and the "previous
content" contains Bits 24-31.

Hitachi hard disk drive specifications
52

8.13 Status Register
Status Register
7

BSY

DRDY

DSC
/SERV

DRQ

CORR

IDX

ERR

Table 32 Status Register
This register contains the device status. The contents of this register are updated whenever an error occurs and
at the completion of each command.
If the host reads this register when an interrupt is pending, it is considered to be the interrupt acknowledge. Any
pending interrupt is cleared whenever this register is read.
If BSY=1, no other bits in the register are valid.
Bit Definitions
BSY

Busy. BSY=1 whenever the device is accessing the registers. The host should not read or
write any registers when BSY=1. If the host reads any register when BSY=1, the contents of
the Status Register will be returned.

DRDY (RDY)

Device Ready. RDY=1 indicates that the device is capable of responding to a command.
RDY will be set to 0 during power on until the device is ready to accept a command. If the
device detects an error while processing a command, RDY is set to 0 until the Status Register
is read by the host, at which time RDY is set back to 1.

Device Fault.

DSC

Device Seek Complete. DSC=1 indicates that a seek has completed and the device head is
settled over a track. DSC is set to 0 by the device just before a seek begins. When an error
occurs, this bit is not changed until the Status Register is read by the host, at which time the
bit again indicates the current seek complete status.

This product does not support DF bit. DF bit is always zero.

When the device enters into or is in Standby mode or Sleep mode, this bit is set by device in
spite of not spinning up.
SERV (SRV)

Service.

DRQ

Data Request. DRQ=1 indicates that the device is ready to transfer a word or byte of data
between the host and the device. The host should not write the Command register when
DRQ=1.

CORR (COR)

Corrected Data. Always 0.

IDX

Index. IDX=1 once per revolution. Since IDX=1 only for a very short time during each
revolution, the host may not see it set to 1 even if the host is reading the Status Register
continuously. Therefore, the host should not attempt to use IDX for timing purposes.

ERR

Error. ERR=1 indicates that an error occurred during execution of the previous command.
The Error Register should be read to determine the error type. The device sets ERR=0 when
the next command is received from the host.

This product does not support SERV bit.

Hitachi hard disk drive specifications
53

General Operation Descriptions

9.1

Reset Response

There are three types of reset in ATA as follows:
Power On Reset (POR)

The device executes a series of electrical circuitry diagnostics, spins
up the HDA, tests speed and other mechanical parametric, and sets
default values.

COMRESET

COMRESET is issued in Serial ATA bus.
The device resets the interface circuitry as well as Soft Reset.

Soft Reset (Software Reset)

SRST bit in the Device Control Register is set, and then is reset.
The device resets the interface circuitry according to the Set Features
requirement.
The actions of each reset are shown in Table 33.

Aborting Host interface
Aborting Device operation
Initialization of hardware
Internal diagnostic
Spinning spindle
Initialization of registers (*2)
Reverting programmed parameters to default
- Number of CHS
(set by Initialize Device Parameter)
- Multiple mode
- Write cache
- Read look-ahead
- ECC bytes
Disable Standby timer
Power mode
o ---- execute
x ---- not execute

POR

COMRESET

Soft Reset

o
o
o
o
o

o
(*1)
x
x
x
o
(*3)

o
(*5)

x
(*4)

Table 33 Reset Response

Table Notes
(*1)

Execute after the data in write cache has been written.

(*2)

Default value on POR is shown in 0 Default Register Values on page55.

(*3)

The Set Features command with Feature register = CCh enables the device to revert these
parameters to the power on defaults.

(*4)

In the case of Sleep mode, the device goes to Standby mode. In other case, the device does
not change current mode.

(*5)

Idle when Power-Up in Standby feature set is disabled. Standby when Power-Up in Standby
feature set is enabled.

Hitachi hard disk drive specifications
54

9.1.1 Register Initialization
Register

Default Value

Error

Diagnostic Code

Sector Count

01h

Sector Number

01h

Cylinder Low

00h

Cylinder High

00h

Device/Head

00h

Status

50h

Alternate Status

50h

Table 34 Default Register Values
After power on, hard reset, or software reset, the register values are initialized as shown in Table 34.
Code

Description

01h

No error Detected

02h

Formatter device error

03h

Sector buffer error

04h

ECC circuitry error

05h

Controller microprocessor error

Table 35 Diagnostic Codes
The meaning of the Error Register diagnostic codes resulting from power on, hard reset or the Execute Device
Diagnostic command is shown in Table 35.

9.2

Diagnostic and Reset considerations

In each case of Power on Reset, COMRESET, Soft reset, and EXECUTE DEVICE DIAGNOSTIC command, the
device is diagnosed. And Error register is set as shown in Table 35.

Hitachi hard disk drive specifications
55

9.3

Sector Addressing Mode

All addressing of data sectors recorded on the device's media is by a logical sector address. The logical CHS
address for HDS7210xxCLA3yz / HUA7220xxCLA33z / HCS5C10xxCLA382 / HCS7210xxCLA3y2 /
HDS5C10xxCLA382 is different from the actual physical CHS location of the data sector on the disk media. All
addressing of data sectors recorded on the device's media.

HDS7210xxCLA3yz / HUA7220xxCLA33z / HCS5C10xxCLA382 / HCS7210xxCLA3y2 /
HDS5C10xxCLA382 support both Logical CHS Addressing Mode and LBA Addressing Mode as the sector
addressing mode.
The host system may select either the currently selected CHS translation addressing or LBA addressing on a
command-by-command basis by using the L bit in the DEVICE/HEAD register. So a host system must set the L
bit to 1 if the host uses LBA Addressing mode.

9.3.1 Logical CHS Addressing Mode
The logical CHS addressing is made up of three fields: the cylinder number, the head number and the sector
number. Sectors are numbered from 1 to the maximum value allowed by the current CHS translation mode but
can not exceed 255(0FFh). Heads are numbered from 0 to the maximum value allowed by the current CHS
translation mode but can not exceed 15(0Fh). Cylinders are numbered from 0 to the maximum value allowed by
the current CHS translation mode but cannot exceed 65535(0FFFFh).
When the host selects a CHS translation mode using the INITIALIZE DEVICE PARAMETERS command, the
host requests the number of sectors per logical track and the number of heads per logical cylinder. The device
then computes the number of logical cylinders available in requested mode.
The default CHS translation mode is described in the Identify Device Information. The current CHS translation
mode also is described in the Identify Device Information.

9.3.2 LBA Addressing Mode
Logical sectors on the device shall be linearly mapped with the first LBA addressed sector (sector 0) being the
same sector as the first logical CHS addressed sector (cylinder 0, head 0, sector 1). Irrespective of the logical
CHS translation mode currently in effect, the LBA address of a given logical sector does not change. The
following is always true:
LBA = ( (cylinder * heads_per_cylinder + heads)
* sectors_per_track ) + sector - 1
where heads_per_cylinder and sectors_per_track are the current translation mode values.

On LBA addressing mode, the LBA value is set to the following register.
Device/Head

<---

Cylinder High

<---

Cylinder Low

<---

Sector Number

<---

LBA
bits
LBA
bits
LBA
bits
LBA
bits

27-24
23-16
15- 8
7- 0

Hitachi hard disk drive specifications
56

9.4

Power Management Feature

The power management feature set permits a host to modify the behavior in a manner which reduces the power
required to operate. The power management feature set provides a set of commands and a timer that enables a
device to implement low power consumption modes.

HDS7210xxCLA3yz / HUA7220xxCLA33z / HCS5C10xxCLA382
HDS5C10xxCLA382 implement the following set of functions.

HCS7210xxCLA3y2

1. A Standby timer
2. Idle command
3. Idle Immediate command
4. Sleep command
5. Standby command
6. Standby Immediate command

9.4.1 Power Mode
The lowest power consumption when the device is powered on occurs in Sleep Mode. When in sleep mode, the
device requires a reset to be activated.
In Standby Mode the device interface is capable of accepting commands, but as the media may not immediately
accessible, there is a delay while waiting for the spindle to reach operating speed.
In Idle Mode the device is capable of responding immediately to media access requests.
In Active Mode the device is under executing a command or accessing the disk media with read look-ahead
function or writes cache function.

9.4.2 Power Management Commands
The Check Power Mode command allows a host to determine if a device is currently in, going to or leaving
standby mode.
The Idle and Idle Immediate commands move a device to idle mode immediately from the active or standby
modes. The idle command also sets the standby timer count and starts the standby timer.
The Standby and Standby Immediate commands move a device to standby mode immediately from the active or
idle modes. The standby command also sets the standby timer count.
The Sleep command moves a device to sleep mode. The device's interface becomes inactive at the completion
of the sleep command. A reset is required to move a device out of sleep mode. When a device exits sleep mode
it will enter Standby mode.

9.4.3 Standby timer
The standby timer provides a method for the device to automatically enter standby mode from either active or
idle mode following a host programmed period of inactivity. If the device is in the active or idle mode, the device
waits for the specified time period and if no command is received, the device automatically enters the standby
mode.
If the value of SECTOR COUNT register on Idle command or Standby command is set to 00h, the standby timer
is disabled.

Hitachi hard disk drive specifications
57

9.4.4 Interface Capability for Power Modes
Each power mode affects the physical interface as defined in the following table:
Mode

BSY

RDY

Interface active

Media

Active

Yes

Active

Idle
Standby
sleep

0
0
x

1
1
x

Yes
Yes
No

Active
Inactive
Inactive

Table 36 Power conditions
Ready (RDY) is not a power condition. A device may post ready at the interface even though the media may not
be accessible.

Hitachi hard disk drive specifications
58

9.5

SMART Function

The intent of Self-monitoring, analysis and reporting technology (SMART) is to protect user data and prevent
unscheduled system downtime that may be caused by predictable degradation and/or fault of the device. By
monitoring and storing critical performance and calibration parameters, SMART devices employ sophisticated
data analysis algorithms to predict the likelihood of near-term degradation or fault condition. By alerting the host
system of a negative reliability status condition, the host system can warn the user of the impending risk of a
data loss and advise the user of appropriate action.

9.5.1 Attributes
Attributes are the specific performance or calibration parameters that are used in analyzing the status of the
device. Attributes are selected by the device manufacturer based on that attribute's ability to contribute to the
prediction of degrading or faulty conditions for that particular device. The specific set of attributes being used
and the identity of these attributes is vendor specific and proprietary.

9.5.2 Attribute values
Attribute values are used to represent the relative reliability of individual performance or calibration attributes.
The valid range of attribute values is from 1 to 253 decimal. Higher attribute values indicate that the analysis
algorithms being used by the device are predicting a lower probability of a degrading or faulty condition existing.
Accordingly, lower attribute values indicate that the analysis algorithms being used by the device are predicting
a higher probability of a degrading or faulty condition existing.

9.5.3 Attribute thresholds
Each attribute value has a corresponding attribute threshold limit which is used for direct comparison to the
attribute value to indicate the existence of a degrading or faulty condition. The numerical values of the attribute
thresholds are determined by the device manufacturer through design and reliability testing and analysis. Each
attribute threshold represents the lowest limit to which its corresponding attribute value can be equal while still
retaining a positive reliability status. Attribute thresholds are set at the device manufacturer's factory and cannot
be changed in the field. The valid range for attribute thresholds is from 1 through 253 decimal.

9.5.4 Threshold exceeded condition
If one or more attribute values, whose Pre-failure bit of their status flag is set, are less than or equal to their
corresponding attribute thresholds, then the device reliability status is negative, indicating an impending
degrading or faulty condition.

9.5.5 SMART commands
The SMART commands provide access to attribute values, attribute thresholds and other logging and reporting
information.

Hitachi hard disk drive specifications
59

9.5.6 Off-line Read Scanning
The device provides the off-line read scanning feature with reallocation. This is the extension of the off-line data
collection capability. The device performs the entire read scan with reallocation for the marginal sectors to
prevent the user data lost.
If interrupted by the host during the read scanning, the device services the host command.

9.5.7 Error Log
Logging of reported errors is supported. The device provides information on the last five errors that the device
reported as described in SMART error log sector. The device may also provide additional vendor specific
information on these reported errors. The error log is not disabled when SMART is disabled. Disabling SMART
shall disable the delivering of error log information via the SMART READ LOG SECTOR command.
If a device receives a firmware modification, all error log data is discarded and the device error count for the life
of the device is reset to zero.

9.5.8 Self-test
The device provides the self-test features which are initiated by SMART Execute Off-line Immediate command.
The self-test checks the fault of the device, reports the test status in Device Attributes Data and stores the test
result in the SMART self-test log sector as described in SMART self-test log data structure. All SMART attributes
are updated accordingly during the execution of self-test.
If interrupted by the host during the self-tests, the device services the host command.
If the device receives a firmware modification, all self-test log data is discarded.

Hitachi hard disk drive specifications
60

9.6

Security Mode Feature Set

Security Mode Feature Set is a powerful security feature. With a device lock password, a user can prevent
unauthorized access to hard disk device even if the device is removed from the computer.
The following commands are supported for this feature.
Security Set Password

('F1'h)

Security Unlock

('F2'h)

Security Erase Prepare

('F3'h)

Security Erase Unit

('F4'h)

Security Freeze Lock

('F5'h)

Security Disable Password

('F6'h)

9.6.1

Security mode

Following security modes are provided.
Device Locked mode
The device disables media access commands after power on. Media access
commands are enabled by either a security unlock command or a security erase
unit command.
Device Unlocked mode

The device enables all commands. If a password is not set this mode is entered
after power on, otherwise it is entered by a security unlock or a security erase
unit command.

Device Frozen mode

The device enables all commands except those which can update the device
lock function, set/change password. The device enters this mode via a Security
Freeze Lock command. It cannot quit this mode until power off.

9.6.2

Security Level

Following security levels are provided.
High level security
When the device lock function is enabled and the User Password is forgotten the
device can be unlocked via a Master Password.
Maximum level security

When the device lock function is enabled and the User Password is forgotten
then only the Master Password with a Security Erase Unit command can unlock
the device. Then user data is erased.

Hitachi hard disk drive specifications
61

9.6.3

Password

This function can have 2 types of passwords as described below.
Master Password

When the Master Password is set, the device does NOT enable the Device Lock
Function, and the device can NOT be locked with the Master Password, but the Master
Password can be used for unlocking the device locked.
Identify Device Information word 92 contains the value of the Master Password Revision
Code set when the Master Password was last changed. Valid values are 0001h through
FFFEh.

User Password

The User Password should be given or changed by a system user. When the User
Password is set, the device enables the Device Lock Function, and then the device is
locked on next power on reset or hard reset.

The system manufacturer/dealer who intends to enable the device lock function for the end users, must set the
master password even if only single level password protection is required.

9.6.4
9.6.4.1

Operation example
Master Password setting

The system manufacturer/dealer can set a new Master Password from default Master Password using the
Security Set Password command, without enabling the Device Lock Function.
The Master Password Revision Code is set to FFFEh as shipping default by the HDD manufacturer

9.6.4.2

User Password setting

When a User Password is set, the device will automatically enter lock mode the next time the device is powered
on.

(Ref.)
< Setting Password >

< No Setting Password >

POR

Set Password with User Password

POR

Normal operation

Power off

Device locked mode

POR

Device unlocked mode

Figure 10 Initial Setting

Hitachi hard disk drive specifications
62

9.6.4.3

Operation from POR after User Password is set

When Device Lock Function is enabled, the device rejects media access command until a Security Unlock
command is successfully completed.

POR

Device Locked mode

Unlock CMD

Erase Prepare

Password
Match ?

Erase Unit
Password
Match ?

Media access
command (*1)

Non-Media access
command (*1)

Reject

Complete

Enter Device
Unlock mode

Complete
Erase Unit

Lock function
Disable
Normal operation : All commands are available

Freeze Lock command

Enter Device Frozen mode
Normal Operation except Set Password,
Disable Password, Erase Unit, Unlock commands.

(*1) Refer to 9.6.5 on the page .65

Figure 11 Usual Operation

Hitachi hard disk drive specifications
63

9.6.4.4

User Password Lost

If the User Password is forgotten and High level security is set, the system user can't access any data. However,
the device can be unlocked using the Master Password.
If a system user forgets the User Password and Maximum security level is set, data access is impossible.
However, the device can be unlocked using the Security Erase Unit command to unlock the device and erase all
user data with the Master Password.

User Password Lost

High

LEVEL ?

Unlock CMD with Master Password

Maximum
Erase Prepare Command
Erase Unit
Command
with Master Password

Normal operation but data lost

Normal operation

Figure 12 Password Lost

9.6.4.5

Attempt limit for SECURITY UNLOCK command

The SECURITY UNLOCK command has an attempt limit. The purpose of this attempt limit is to prevent that
someone attempts to unlock the drive by using various passwords many times.
The device counts the password mismatch. If the password does not match, the device counts it up without
distinguishing the Master password and the User password. If the count reaches 5, EXPIRE bit (bit 4) of Word
128 in Identify Device information is set, and then SECURITY ERASE UNIT command and SECURITY
UNLOCK command are aborted until a hard reset or a power off. The count and EXPIRE bit are cleared after a
power on reset or a hard reset.

Hitachi hard disk drive specifications
64

9.6.5 Command Table
This table shows the device's response to commands when the Security Mode Feature Set (Device lock
function) is enabled.
Command

Locked Mode

Unlocked Mode

Frozen Mode

Executable

Command aborted

Executable

Device Configuration Restore

Command aborted

Executable

Device Configuration Freeze Lock

Command aborted

Executable

Device Configuration Identify

Command aborted

Executable

Device Configuration Set

Command aborted

Executable

Download Microcode

Command aborted

Executable

Flush Cache

Command aborted

Executable

Flush Cache Ext

Command aborted

Executable

Format Track

Check Power Mode
Configure Stream
Execute Device Diagnostic

Command aborted

Executable

Identify Device

Executable

Idle

Executable

Idle Immediate

Executable

Initialize Device Parameters

Executable

Read Buffer

Executable

Read DMA

Command aborted

Executable

Read DMA Ext

Command aborted

Executable

Read FPDMA Queued

Command aborted

Executable

Read Log Ext

Executable

Read Multiple

Command aborted

Executable

Read Multiple Ext

Command aborted

Executable

Read Native Max Address

Executable

Read Native Max Ext

Executable

Read Sector(s)

Command aborted

Executable

Read Sector(s) Ext

Command aborted

Executable

Read Stream DMA

Command aborted

Executable

Read Stream PIO

Command aborted

Executable

Read Verify Sector(s)

Command aborted

Executable

Read Verify Sector(s) Ext

Command aborted

Executable

SCT Read/Write Long

Command aborted

SCT Write Same

Command aborted

Executable

SCT Error Recovery Control

Command aborted

Executable

SCT Feature Control

Command aborted

Executable

SCT Data Table

Command aborted

Executable

Command aborted

Executable

Command aborted

Executable

Command aborted

Recalibrate

SCT Read Status
Security Disable Password
Security Erase Prepare

Table 37 Command table for device lock operation -1
Hitachi hard disk drive specifications
65

Command

Locked Mode

Unlocked Mode

Frozen Mode

Executable

Command aborted

Security Freeze Lock

Command aborted

Executable

Security Set Password

Command aborted

Executable

Command aborted

Security Unlock

Executable

Command aborted

Seek

Executable

Set Features

Executable

Set Max Address

Command aborted

Executable

Set Max Address Ext

Command aborted

Executable

Set Multiple Mode

Executable

Sleep

Executable

SMART Disable Operations

Executable

SMART Enable/Disable Attributes Autosave

Executable

SMART Enable Operations

Executable

SMART Execute Off-line Immediate

Executable

SMART Read Attribute Values

Executable

SMART Read Attribute Thresholds

Executable

SMART Return Status

Executable

SMART Save Attribute Values

Executable

SMART Read Log Sector

Executable

SMART Write Log Sector

Executable

SMART Enable/Disable Automatic Off-Line

Executable

Standby

Executable

Standby Immediate

Executable

Write Buffer

Executable

Write DMA

Command aborted

Executable

Write DMA Ext

Command aborted

Executable

Write DMA FUA Ext

Command aborted

Executable

Write FPDMA Queued

Command aborted

Executable

Write Log Ext

Command aborted

Executable

Write Multiple

Command aborted

Executable

Write Multiple Ext

Command aborted

Executable

Write Multiple FUA Ext

Command aborted

Executable

Write Sector(s)

Command aborted

Executable

Write Sector(s) Ext

Command aborted

Executable

Write Stream DMA

Command aborted

Executable

Write Stream PIO

Command aborted

Executable

Write Uncorrectable Ext

Command aborted

Executable

Security Erase Unit

Table 38 Command table for device lock operation -2

Hitachi hard disk drive specifications
66

9.7

Host Protected Area Feature

Host Protected Area Feature is to provide the 'protected area' which can not be accessed via conventional
method. This 'protected area' is used to contain critical system data such as BIOS or system management
information. The contents of entire system main memory may also be dumped into 'protected area' to resume
after system power off.
The LBA/CYL changed by following command affects the Identify Device Information.
The following set of commands is implemented for this function.
Read Native Max ADDRESS

('F8'h)

Set Max ADDRESS

('F9'h)

9.7.1 Example for operation (In LBA mode)
Assumptions:
For better understanding, the following example uses actual values for LBA, size, etc. Since it is just an example,
these values could be different.
Device characteristics

Capacity (native)

6,498,680,832

Max LBA

12,692,735

Required size for protected area

206,438,400

Required blocks for protected area

403,200

Customer usable device size

Customer usable sector count

LBA range for protected area

(native)

6,292,242,432
12,289,536

byte (6.4GB)
(0FFFFFh)
byte
(062700h)
byte (6.2GB)
(BB8600h)

BB8600h to C1ACFFh

Shipping HDDs from HDD manufacturer

When the HDDs are shipped from HDD manufacturer, the device has been tested to have usable capacity
of 6.4GB besides flagged media defects not to be visible by system.
2.

Preparing HDDs at system manufacturer

Special utility software is required to define the size of protected area and store the data into it.
The sequence is:
Issue Read Native Max Address command to get the real device maximum LBA. Returned value shows
that native device Maximum LBA is 12,692,735 (C1ACFFh) regardless of the current setting.
Make entire device be accessible including the protected area by setting device Maximum LBA as
12,692,735 (C1ACFFh) via Set Max Address command. The option could be either nonvolatile or
volatile.
Test the sectors for protected area (LBA >=

12,289,536 (BB8600h)) if required.

Hitachi hard disk drive specifications
67

Write information data such as BIOS code within the protected area.
Change maximum LBA using Set Max Address command to 12,289,535 (BB85FFh) with nonvolatile
option.
From this point, the protected area cannot be accessed till next Set Max Address command is issued.
Any BIOSes, device drivers, or application software access the HDD as if that is the 6.2GB device
because the device acts exactly the same as real 6.2GB device does.
3.

Conventional usage without system software support
Since the HDD works as 6.2GB device, there is no special care to use this device for normal use.

Advanced usage using protected area

The data in the protected area is accessed by following.
Issue Read Native Max Address command to get the real device maximum LBA. Returned value shows
that native device Maximum LBA is 12,692,735 (C1ACFFh) regardless of the current setting.
Make entire device be accessible including the protected area by setting device Maximum LBA as
12,692,735 (C1ACFFh) via Set Max Address command with volatile option. By using this option,
unexpected power removal or reset will not make the protected area remained accessible.
Read information data from protected area.
Issue hard reset or POR to inhibit any access to the protected area.

9.7.2 Security extensions
1. Set Max Set Password
2. Set Max Lock
3. Set Max Freeze Lock
4. Set Max Unlock.
The Set Max Set Password command allows the host to define the password to be used during the current
power on cycle. The password does not persist over a power cycle but does persist over a hardware or software
reset. This password is not related to the password used for the Security Mode Feature set. When the password
is set the device is in the Set_Max_Unlocked mode. The Set Max Lock command allows the host to disable the
Set Max commands (except set Max Unlock) until the next power cycle or the issuance and acceptance of the
Set Max Unlock command. When this command is accepted the device is in the Set_Max_Locked mode. The
Set Max Unlock command changes the device from the Set_Max_Locked mode to the Set_Max_Unlocked
mode. The Set Max Freeze Lock command allows the host to disable the Set Max commands (including Set
Max UNLOCK) until the next power cycle. When this command is accepted the device is in the Set_Max_Frozen
mode.
The IDENTIFY DEVICE response word 83, bit 8 indicates that this extension is supported if set, and word 86, bit
8 indicate the Set Max security extension enabled if set.

Hitachi hard disk drive specifications
68

9.8

Write Cache Function

Write cache is a performance enhancement whereby the device reports as completing the write command
(Write Sector(s), Write Multiple and Write DMA) to the host as soon as the device has received all of the data
into its buffer. And the device assumes responsibility to write the data subsequently onto the disk.


While writing data after completed acknowledgment of a write command, soft reset or hard reset does not
affect its operation. But power off terminates writing operation immediately and unwritten data are to be lost.



Soft reset, Standby (Immediate) command and Flush Cache commands during writing the cached data are
executed after the completion of writing to media. So the host system can confirm the completion of write
cache operation by issuing Soft reset, Standby (Immediate) command or Flush Cache command to the
device before power off.

Hitachi hard disk drive specifications
69

9.9

Reassign Function

The reassign Function is used with read commands and write commands. The sectors of data for reassignment
are prepared as the spare data sector.
This reassignment information is registered internally, and the information is available right after completing the
reassign function. Also the information is used on the next power on reset or hard reset.
If the number of the spare sector reaches 0 sectors, the reassign function will be disabled automatically.
The spare tracks for reassignment are located at regular intervals from Cylinder 0. As a result of reassignment,
the physical location of logically sequenced sectors will be dispersed.

9.9.1

Auto Reassign Function

The sectors those show some errors may be reallocated automatically when specific conditions are met. The
spare tracks for reallocation are located at regular intervals from Cylinder 0. The conditions for auto-reallocation
are described below.
Non recovered write errors
When a write operation can not be completed after the Error Recovery Procedure (ERP) is fully carried out, the
sector(s) are reallocated to the spare location. An error is reported to the host system only when the write cache
is disabled and the auto reallocation is failed.
If the write cache function is ENABLED, and when the number of available spare sectors reaches 0 sectors,
both auto reassign function and write cache function are disabled automatically.
Non recovered read errors
When a read operation is failed after defined ERP is fully carried out, a hard error is reported to the host system.
This location is registered internally as a candidate for the reallocation. When a registered location is specified
as a target of a write operation, a sequence of media verification is performed automatically. When the result of
this verification meets the criteria, this sector is reallocated.
Recovered read errors
When a read operation for a sector failed once then recovered at the specific ERP step, this sector of data is
reallocated automatically. A media verification sequence may be run prior to the relocation according to the
pre-defined conditions.

Hitachi hard disk drive specifications
70

9.10 Power-up in Standby feature set
Power-Up In Standby feature set allows devices to be powered-up into the Standby power management state to
minimize inrush current at power-up and to allow the host to sequence the spin-up of devices.
This feature set will be enabled/disabled via the SET FEATURES command. The enabling of this feature set
shall be persistent after power cycle.
A device needs a SET FEATURES subcommand to spin-up to active state when the device has powered-up into
Standby. The device remains in Standby until the SET FEATURES subcommand is received.
If power-up into Standby is enabled, when an IDENTIFY DEVICE is received while the device is in Standby as a
result of powering up into Standby, the device shall set word 0 bit 2 to one to indicate that the response is
incomplete, then only words 0 and 2 are correctly reported.
The IDENTIFY DEVICE information indicates the states as follows:





identify device information is complete or incomplete
this feature set is implemented
this feature set is enabled or disabled
the device needs the Set Features command to spin-up into active state

9.11 Advanced Power Management feature set (APM)
This feature allows the host to select an advanced power management level. The advanced power management
level is a scale from the lowest power consumption setting of 01h to the maximum performance level of FEh.
Device performance may increase with increasing advanced power management levels. Device power
consumption may increase with increasing advanced power management levels. The advanced power
management levels contain discrete bands, described in the section of Set Feature command in detail. This
feature set uses the following functions:
1.
2.

A SET FEATURES subcommand to enable Advanced Power Management
A SET FEATURES subcommand to disable Advanced Power Management

Advanced Power Management is independent of the Standby timer setting. If both Advanced Power
Management and the Standby timer are set, the device will go to the Standby state when the timer times out or
the device‟s Advanced Power Management algorithm indicates that the Standby state should be entered.
The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management feature is
supported if set. Word 86, bit 3 indicates that Advanced Power Management is enabled if set. Word 91, bits 7-0
contain the current Advanced Power Management level if Advanced Power Management is enabled.

Hitachi hard disk drive specifications
71

9.12 48-bit Address Feature Set
The 48-bit Address feature set allows devices with capacities up to 281,474,976,710,655 sectors. This allows
device capacity up to 144,115,188,075,855,360 bytes. In addition, the number of sectors that may be transferred
by a single command are increased by increasing the allowable sector count to 16 bits.
Commands unique to the 48-bit Address feature set are:


Flush Cache Ext



Read DMA Ext



Read FPDMA Queued



Read Multiple Ext



Read Native Max Address Ext



Read Sector(s) Ext



Read Verify Sector(s) Ext



Set Max Address Ext



Write DMA Ext



Write DMA FUA Ext



Write FPDMA Queued



Write Multiple Ext



Write Multiple FUA Ext



Write Sector(s) Ext



Write Uncorrectable Ext

The 48-bit Address feature set operates in LBA addressing only. Devices also implement commands using
28-bit addressing, and 28-bit and 48-bit commands may be intermixed.
In a device, the Features, the Sector Count, the Sector Number, the Cylinder High, and the Cylinder Low
registers are a two-byte-deep FIFO. Each time one of these registers is written, the new content written is placed
into the "most recently written" location and the previous content is moved to "previous content" location.
The host may read the "previous content" of the Features, the Sector Count, the Sector Number, the Cylinder
High, and the Cylinder Low registers by first setting the High Order Bit (HOB, bit 7) of the Device control register
to one and then reading the desired register. If HOB in the Device Control register is cleared to zero, the host
reads the "most recently written" content when the register is read. A write to any Command Block register shall
cause the device to clear the HOB bit to zero in the Device Control register. The "most recently written" content
always gets written by a register write regardless of the state of HOB in the Device Control register.
Support of the 48-bit Address feature set is indicated in the Identify Device response bit 10 word 83. In addition,
the maximum user LBA address accessible by 48-bit addressable commands is contained in Identify Device
response words 100 through 103.
When the 48-bit Address feature set is implemented, the native maximum address is the value returned by a
Read Native Max Address Ext command. If the native maximum address is equal to or less than 268,435,455, a
Read Native Max Address shall return the native maximum address. If the native maximum address is greater
than 268,435,455, a Read Native Max Address shall return a value of 268,435,455.

Hitachi hard disk drive specifications
72

9.13 Streaming feature Set
The Streaming feature set is an optional feature set that allows a host to request delivery of data from a
contiguous logical block address range within an allotted time. This places a priority on time to access the data
rather than the integrity of the data. Streaming feature set commands only support 48-bit addressing.
A device that implements the Streaming feature set shall implement the following minimum set of commands:
 Configure Stream


Read Stream PIO



Write Stream PIO



Read Stream DMA



Write Stream DMA



Read Log Ext

Support of the Streaming feature set is indicated in Identify Device work 84 bit 4.
Note that PIO versions of these commands limit the transfer rate (16.6 MB/s), provide no CRC protection, and
limit status reporting as compared to a DMA implementation.

9.13.1

Streaming commands

The streaming commands are defined to be time critical data transfers rather than the standard data integrity
critical commands. Each command shall be completed within the time specified in the Configure Stream
command or in the streaming command itself in order to ensure the stream requirements of the AV type
application. The device may execute background tasks as long as the Read Stream and Write Stream command
execution time limits are still met.
Using the Configure Stream command, the host may define the various stream properties including the default
Command Completion Time Limit (CCTL) to assist the device in setting up its caching for best performance. If
the host does not use a Configure Stream command, the device shall use the CCTL specified in each streaming
command, and the time limit is effective for one time only. If the CCTL is not set by Configure Stream command,
the operation of a streaming command with a zero CCTL is device vendor specific. If Stream ID is not set by a
Configure Stream command, the device shall operate according to the Stream ID set by the streaming
command. The operation is device vendor specific.
The streaming commands may access any user LBA on a device. These commands may be interspersed with
non-streaming commands, but there may be an impact on performance due to the unknown time required to
complete the non-streaming commands.
The streaming commands should be issued using a specified minimum number of sectors transferred per
command, as specified in word 95 of the Identify Device response. The transfer length of a request should be
a multiple of the minimum number of sectors per transfer.

The host provided numeric stream identifier, Stream ID, may be used by the device to configure its resources to
support the streaming requirements of the AV content. One Stream ID may be configured for each read and
write operation with different command completion time limits be each Configure Stream command.

Hitachi hard disk drive specifications
73

9.13.1.1

Urgent bit

The Urgent bit in the Read Stream and Write Stream commands specifies that the command should be
completed in the minimum possible time by the device and shall be completed within the specified Command
Completion Time Limit.

9.13.1.2

Flush to Disk bit

The Flush to Disk bit in the Write Stream command specifies that all data for the specified stream shall be
flushed to the media before posting command completion. If a host requests flushes at times other than the
end of each Allocation Unit, streaming performance may be degraded. The Set Features command to
enable/disable caching shall not affect caching for streaming commands.

9.13.1.3

Not Sequential bit

The Not Sequential bit specifies that the next read stream command with the same Stream ID may not be
sequential in LBA space. This information helps the device with pre-fetching decisions.

9.13.1.4

Read Continuous bit

If the Read Continuous bit is set to one for the command, the device shall transfer the requested amount of data
to the host within the Command Completion Time Limit even if an error occurs. The data sent to the host by
the device in an error condition is vendor specific.

9.13.1.5

Write Continuous bit

If the Write Continuous bit is set to one for the command, and an error is encountered, the device shall complete
the request without posting an error. If an error cannot be resolved within the Command Completion Time Limit,
the erroneous section on the media may be unchanged or may contain undefined data. A future read of this
area may not report an error, even though the data is erroneous.

9.13.1.6

Handle Streaming Error bit

The Handle Streaming Error bit specifies to the device that this command starts at the LBA of a recently reported
error section, so the device may attempt to continue its corresponding error recovery sequence where it left off
earlier. This mechanism allows the host to schedule error recovery and defect management for content critical
data.

9.13.2

Streaming Logs

The Streaming Data Transfer feature set requires two error logs and one performance log. These logs are
accessed via the Read Log Ext command; the information included in the error logs is volatile and is not
maintained across power cycles, hard resets, or sleep. These error logs are 512 bytes in length and retain the
last 31 errors that occurred during any Streaming Data transfer.

Hitachi hard disk drive specifications
74

9.14 SATA BIST (Built-in Self Test)
The device supports the following BIST modes, and begins operations when it receives BIST Activate FIS.
F – Far End Analog Loopback.
L – Far End Retimed Loopback
T – Far End Transmit only
A – ALIGN Bypass (valid only in combination with T bit)
S – Bypass Scrambling (valid only in combination with T bit)

9.15 SATA Interface Power Management
The device supports both receiving host-initiated interface power management requests and initiating
interface power management. The device initiates interface power management when the device enters its
power saving mode whose power consumption is lower than Normal Idle mode.

Hitachi hard disk drive specifications
75

9.16 Software Setting Preservation
When a device is enumerated, software will configure the device using SET FEATURES and other commands.
These software settings are often preserved across software reset but not necessarily across hardware reset.
In Parallel ATA, only commanded hardware resets can occur, thus legacy software only reprograms settings that
are cleared for the particular type of reset it has issued. In Serial ATA, COMRESET is equivalent to hard reset
and a non-commanded COMRESET may occur if there is an asynchronous loss of signal. Since COMRESET
is equivalent to hardware reset, in the case of an asynchronous loss of signal some software settings may be
lost without legacy software knowledge. In order to avoid losing important software settings without legacy
driver knowledge, the software settings preservation ensures that the value of important software settings is
maintained across a COMRESET. Software settings preservation may be enabled or disabled using SET
FEATURES with a subcommand code of 06h. If a device supports software settings preservation, the feature
shall be enabled by default.

9.16.1

COMRESET Preservation Requirements

The software settings that shall be preserved across COMRESET are listed below. The device is only required
to preserve the indicated software setting if it supports the particular feature/command the setting is associated
with.
INITIALIZE DEVICE PARAMETERS: Device settings established with the INITIALIZE DEVICE
PARAMETERS command.
Power Management Feature Set Standby Timer:
feature set.

The Standby timer used in the Power Management

Read/Write Stream Error Log: The Read Stream Error Log and Write Stream Error Logs (accessed using
READ LOG EXT and WRITE LOG EXT).
Security mode state: The security mode state established by Security Mode feature set commands (refer
to section 6.13 of the ATA/6 specification). The device shall not transition to a different security mode state
based on a COMRESET. For example, the device shall not transition from the SEC5: Unlocked / not
Frozen state to state SEC4: Security enabled / Locked when a COMRESET occurs, instead the device shall
remain in the SEC5: Unlocked / not Frozen state.
SECURITY FREEZE LOCK: The Frozen mode setting established by the SECURITY FREEZE LOCK
command.
SECURITY UNLOCK: The unlock counter that is decremented as part of a failed SECURITY UNLOCK
command attempt.
SET ADDRESS MAX (EXT):
MAX EXT.

The maximum LBA specified in SET ADDRESS MAX or SET ADDRESS

SET FEATURES (Write Cache Enable/Disable): The write cache enable/disable setting established by the
SET FEATURES command with subcommand code of 02h or 82h.
SET FEATURES (Set Transfer Mode): PIO, Multiword, and UDMA transfer mode settings established by
the SET FEATURES command with subcommand code of 03h.
SET FEATURES (Advanced Power Management Enable/Disable): The advanced power management
enable/disable setting established by the SET FEATURES command with subcommand code of 05h or 85h.
The advanced power management level established in the Sector Count register when advanced power
management is enabled (SET FEATURES subcommand code 05h) shall also be preserved.
SET FEATURES (Read Look-Ahead): The read look-ahead enable/disable setting established by the SET
FEATURES command with subcommand code of 55h or AAh.
SET FEATURES (Reverting to Defaults): The reverting to power-on defaults enable/disable setting
established by the SET FEATURES command with a subcommand code of CCh or 66h.
SET MULTIPLE MODE: The block size established with the SET MULTIPLE MODE command.

Hitachi hard disk drive specifications
76

9.17

SATA II Optional Features

There are several optional features defined in SATA II. The following shows whether these features are
supported or not.

9.17.1

Asynchronous Signal Recovery

The device supports asynchronous signal recovery defined in SATA II.

9.17.2

Device Power Connector Pin 11 Definition

SATA II specification defines that Pin 11 of the power segment of the device connector may be used to
provide the host with an activity indication and disabling of staggered spin-up. The device does not support
both usage of Pin 11.

9.17.3

Phy Event Counters

Phy Event Counters are an optional feature to obtain more information about Phy level events that occur on the
interface. This information may aid designers and integrators in testing and evaluating the quality of the interface.
A device indicates whether it supports the Phy event counters feature in IDENTIFY (PACKET) DEVICE Word 76,
bit 10. The host determines the current values of Phy event counters by issuing the READ LOG EXT command
with a log page of 11h. The counter values shall not be retained across power cycles. The counter values shall
be preserved across COMRESET and software resets.
The counters defined can be grouped into three basic categories: those that count events that occur during Data
FIS transfers, those that count events that occur during non-Data FIS transfers, and events that are unrelated to
FIS transfers. Counters related to events that occur during FIS transfers may count events related to
host-to-device FIS transfers, device-to-host FIS transfers, or bi-directional FIS transfers. A counter that records
bi-directional events is not required to be the sum of the counters that record the same events that occur on
device-to-host FIS transfers and host-to-device FIS transfers.
Implementations that support Phy event counters shall implement all mandatory counters, and may support any
of the optional counters as shown in 0. Note that some counters may increment differently based on the speed
at which non-Data FIS retries are performed by the host and device. Implementations may record CRC and
non-CRC error events differently. For example, there is a strong likelihood that a disparity error may cause a
CRC error. Thus, the disparity error may cause both the event counter that records non-CRC events and the
event counter that records CRC events to be incremented for the same event. Another example implementation
difference is how a missing EOF event is recorded; a missing EOF primitive may imply a bad CRC even though
the CRC on the FIS may be correct. These examples illustrate that some Phy event counters are sensitive to the
implementation of the counters themselves, and thus these implementation sensitive counters cannot be used
as an absolute measure of interface quality between different implementations.

9.17.3.1

Counter Reset Mechanisms

There are two mechanisms by which the host can explicitly cause the Phy counters to be reset.
The first mechanism is to issue a BIST Activate FIS to the device. Upon reception of a BIST Activate FIS the
device shall reset all Phy event counters to their reset value. The second mechanism uses the READ LOG EXT
command. When the device receives a READ LOG EXT command for log page 11h and bit 0 in the Features
register is set to one, the device shall return the current counter values for the command and then reset all Phy
event counter values.

Hitachi hard disk drive specifications
77

9.17.3.2

Counter Identifiers

Each counter begins with a 16-bit identifier. 0 defines the counter value for each identifier. Any unused counter
slots in the log page should have a counter identifier value of 0h.
Optional counters that are not implemented shall not be returned in log page 11h. A value of „0‟ returned for a
counter means that there have been no instances of that particular event. There is no required ordering for event
counters within the log page; the order is arbitrary and selected by the device vendor.
For all counter descriptions, „transmitted‟ refers to items sent by the device to the host and „received‟ refers to
items received by the device from the host.
Bits 14:12 of the counter identifier convey the number of significant bits that counter uses. All
counter values consume a multiple of 16-bits. The valid values for bits 14:12 and the
corresponding counter sizes are:
1h 16-bit counter
2h 32-bit counter
3h 48-bit counter
4h 64-bit counter
Any counter that has an identifier with bit 15 set to one is vendor specific. This creates a vendor specific range of
counter identifiers from 8000h to FFFFh. Vendor specific counters shall observe the number of significant bits
14:12 as defined above.
Identifier
(Bits 11:0)
000h
001h
002h
003h
004h
005h
006h
007h
008h
009h
00Ah
00Bh
00Dh
00Fh

Mandatory /
Optional
Mandatory
Mandatory
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Mandatory
Optional
Optional
Optional

010h

Optional

012h

Optional

013h

Optional

Description
No counter value; marks end of counters in the page
Command failed and ICRC bit set to one in Error register
R_ERR response for Data FIS
Not supported (R_ERR response for Device-to-Host Data FIS)
Not supported (R_ERR response for Host-to-Device Data FIS)
R_ERR response for Non-data FIS
Not supported (R_ERR response for Device-to-Host Non-data FIS)
Not supported (R_ERR response for Host-to-Device Non-data FIS)
Not supported (Device-to-Host non-Data FIS retries)
Transitions from drive PhyRdy to drive PhyNRdy
Signature Device-to-Host Register FISes sent due to a COMRESET
CRC errors within a Host-to-Device FIS
Non-CRC errors within a Host-to-Device FIS
Not supported (R_ERR response for Host-to-Device Data FIS due to CRC
errors)
Not supported (R_ERR response for Host-to-Device Data FIS due to
non-CRC errors)
Not supported (R_ERR response for Host-to-Device Non-data FIS due to
CRC errors)
Not supported (R_ERR response for Host-to-Device Non-data FIS due to
non-CRC errors)

Table 39 Phy Event Counter Identifiers

Hitachi hard disk drive specifications
78

9.17.3.2.1

Counter Definitions

The counter definitions in this section specify the events that a particular counter identifier
represents.
9.17.3.2.1.1

Identifier 000h

There is no counter associated with identifier 000h. A counter identifier of 000h indicates that
there are no additional counters in the log page.
9.17.3.2.1.2

Identifier 001h

The counter with identifier 001h returns the number of commands that returned an ending status
with the ERR bit set to one in the Status register and the ICRC bit set to one in the Error register.
9.17.3.2.1.3

Identifier 002h

The counter with identifier 002h returns the sum of (the number of transmitted Device-to-Host
Data FISes to which the host responded with R_ERRP) and (the number of received Host-toDevice Data FISes to which the device responded with R_ERR P).
9.17.3.2.1.4

Identifier 005h

The counter with identifier 005h returns the sum of (the number of transmitted Device-to-Host
non-Data FISes to which the host responded with R_ERRP) and (the number of received Host-toDevice non-Data FISes to which the device responded with R_ERRP). Retries of non-Data FISes
are included in this count.
9.17.3.2.1.5

Identifier 009h

The counter with identifier 009h returns the number of times the device transitioned into the
PHYRDY state from the PHYNRDY state, including but not limited to asynchronous signal events,
power management events, and COMRESET events. If interface power management is enabled,
then this counter may be incremented due to interface power management transitions.
9.17.3.2.1.6

Identifier 00Ah

The counter with identifier 00Ah returns the number of transmitted Device-to-Host Register FISes
with the device reset signature in response to a COMRESET, which were successfully followed by
an R_OK from the host.
9.17.3.2.1.7

Identifier 00Bh

The counter with identifier 00Bh returns the number of received Host-to-Device FISes of all types
(Data and non-Data) to which the device responded with R_ERRP due to CRC error.
9.17.3.2.1.8

Identifier 00Dh

The counter with identifier 00Dh returns the number of received Host-to-Device FISes of all types
(Data and non-Data) to which the devices responded with R_ERRP for reasons other than CRC
error.

Hitachi hard disk drive specifications
79

9.17.3.3

READ LOG EXT Log Page 11h

READ LOG EXT log page 11h is one page (512 bytes) in length. The first Dword of the log page contains
information that applies to the rest of the log page. Software should continue to process counters until a counter
identifier with value 0h is found or the entire page has been read. A counter identifier with value 0h indicates that
the log page contains no more counter values past that point. Log page 11h is defined in Table 40.
Byte
0
1
2
3
…
n
n+1
n+2
n+
Counter
n Length
…
508
509
510
511

3
Reserved
Reserved
Reserved
Reserved
…

Counter n Identifier

Counter n Value
…
Reserved
Data Structure Checksum

Table 40 READ LOG EXT Log Page 11h data structure definition

Counter n Identifier
Phy event counter identifier that corresponds to Counter n Value. Specifies the particular event counter
that is being reported. The Identifier is 16 bits in length.
Valid identifiers are listed in Table 40.
Counter n Value
Value of the Phy event counter that corresponds to Counter n Identifier. The number of significant bits is
determined by Counter n Identifier bits 14:12 (as defined in section 4.3.2). The length of Counter n Value
shall always be a multiple of 16-bits. All counters are one-extended. For example, if a counter is only
physically implemented as 8-bits when it reaches the maximum value of 0xFF, it shall be one-extended to
0xFFFF. The counter shall stop (and not wrap to zero) after reaching its maximum value.
Counter n Length
Size of the Phy event counter as defined by bits 14:12 of Counter n Identifier.
The size of the Phy event counter shall be a multiple of 16-bits.
Data Structure Checksum
The data structure checksum is the 2‟s complement of the sum of the first 511 bytes in the data structure.
Each byte shall be added with unsigned arithmetic and overflow shall be ignored. The sum of all 512
bytes of the data structure will be zero when the checksum is correct.
Reserved All reserved fields shall be cleared to zero

Hitachi hard disk drive specifications
80

9.18 SCT Command Transport feature Set
9.18.1

Overview

9.18.1.1

Introduction

SMART Command Transport (SCT) is the method for the drive to receive commands using log page E0h and
transporting data using log page E1h. These log pages are used as follows:

Log page E0h

Log Page E1h

Write log page

Issue Command

Send Data to the drive

Read log page

Return Status

Received Data from the drive

Table 41 SCT Log Page and direction

There are two ways to access the log pages: using SMART READ/WRITE LOG and READ/WRITE LOG EXT.
Both sets of commands access the same log pages and provide the same capabilities.
The log directory for log pages E0h and E1h should report a length of one. The length of log page E1h does not
indicate the length of an SCT data transfer.
If SMART is supported, but not enabled, the drive supports SMART READ/WRITE LOG for Log page E0h and
E1h.
If security is enabled and password has not been issued to unlock the device, all SCT commands will fail.

9.18.1.2

Capability definition

Capability Identification is performed by issuing Identify Device command. Word 206 of Identify Data is used to
determine if SCT is enabled and which SCT Action Codes are supported.

Word
206

Description
SCT Command set support
15-12

Vendor Specific

11-6

Reserved

Action Code 5 (SCT Data Table) supported

Action Code 4 (Features Control) supported

Action Code 3 (Error Recovery Control) supported

Action Code 2 (SCT Write Same) supported

Obsolete

SCT Feature Set supported (includes SCT status)

Table 42 Identify Device Information Word 206

Hitachi hard disk drive specifications
81

9.18.1.3

SCT Command Nesting and intermingling with Standard commands

In general, standard ATA commands can be intermingled with SCT Commands but SCT commands cannot be
nested. SCT commands that do not require a follow-on data transfer operation never have an issue with being
intermixed with any ATA commands or each other. SCT commands that do require data transfer, on the other
hand, may not be nested; that is, if a key command that requires a data transfer is issued, all data transfer - to or
from the host - must complete before another SCT command is issued. In most cases, however, ATA
read/write commands may be inserted in between SCT data transfers, that is, between complete SMART Read
Log/Write Log commands. Furthermore, any reset (power-on, software or hardware) will cause the SCT
command to be aborted.

9.18.1.4

Resets

In an SCT command is executing, any reset including Soft Reset, Hard Reset, COMRESET, and Power-On
Reset all cause the command to be terminated. This could result in partial command execution or data loss.
There is no indication once the drive becomes ready that the previous command was terminated.

Hitachi hard disk drive specifications
82

9.18.2

SCT Command Protocol

9.18.2.1

Command Transport

SCT Command Transport occurs when a 512-byte data packet (called “Key Sector”) is created and the written to
SMART or extended log page E0h. The key sector specifies Action and Function Codes along with the
parameters that are required to perform the action.

9.18.2.1.1

Issue SCT Command Using SMART

Command Block Output Registers
Register

7 6 5 4 3 2 1 0

Feature

D6h

Sector Count

01h

Sector Number

E0h

Cylinder Low

4Fh

Cylinder High

C2h

Device/Head

- D -

Command

B0h

Table 43 Output Registers of SCT Command Using SMART
Command Block Input Registers (Success)

Command Block Input Registers (Error)

7 6 5 4 3 2 1 0

Error

00h

7 6 5 4 3 2 1 0

Error

04h

Sector Count

Depends on command
(LSB)

Sector Count

Extended Status code
(LSB)

Sector Number

Depends on command
(MSB)

Sector Number

Extended Status code
(MSB)

Cylinder Low

Number of sectors to
transfer (LSB)

Cylinder Low

Number of sectors to
transfer (LSB)

Cylinder High

Number of sectors to
transfer (MSB)

Cylinder High

Number of sectors to
transfer (MSB)

Device/Head
Status

50h

Device/Head
Status

Table 44 Input Registers of SCT Command Using SMART

Hitachi hard disk drive specifications
83

51h

9.18.2.1.2

Issue SCT Command Using Write Log Ext

Command Block Output Registers
Register
Feature

Sector Count

LBA Low

LBA Mid

LBA High

7 6 5 4 3 2 1 0
Current

Reserved

Current

01h

00h

Current

E0h

Reserved

Current

00h

Current

Reserved

Device/Head

- D -

Command

3Fh

Table 45 Input Registers of SCT Command Using Write Log Ext
Command Block Input Registers (Success)

Command Block Input Registers (Error)

7 6 5 4 3 2 1 0

Error
Sector Count

LBA Low

LBA Mid

LBA High

Device/Head
Status

00h

Error

HOB=0

Depends on command
(LSB)

HOB=1

Reserved

HOB=0

Depends on command
(MSB)

HOB=1

Reserved

HOB=0

Number of sectors (LSB)

HOB=1

Reserved

HOB=0

Number of sectors (MSB)

HOB=1

Reserved
-

50h

7 6 5 4 3 2 1 0

Sector Count

LBA Low

LBA Mid

LBA High

04h
HOB=0

Extended Status Code
(LSB)

HOB=1

Reserved

HOB=0

Extended Status Code
(MSB)

HOB=1

Reserved

HOB=0

Number of sectors (LSB)

HOB=1

Reserved

HOB=0

Number of sectors (MSB)

HOB=1

Reserved

Device/Head
Status

All ATA “previous” registers are reserved in Write Log Ext responses.

Table 46 Output Registers of SCT Command Using Write Log Ext

Hitachi hard disk drive specifications
84

51h

9.18.2.1.3

Key Sector Format

An SCT command (Key Sector) is always 512 bytes long. Table below shows the generic format of an SCT
command.
Byte
1:0

Field
Action Code

Words
1

3:2

Function Code

X:4
Y:x+1
…

Parameter1
Parameter2
…
Total Words

Depends on command
Depends on command
…
256

Description
This field defines the command type and
generally specifies the type of data being
accessed, such as sector or physical action
being performed, such as seek.
This field specifies the type of access, and
varies by command. For example, this can
specify read, write, verify, etc.
Depends on command
Depends on command
…

Table 47 Key Sector Format
The action codes are defined in Table below.
Action Code

Block Data

TF Data

Description

0000h

Reserved

0001h

Read/Write

Long Sector Access

0002h

Write

SCT Write Same

0003h

Error Recovery Control

0004h

Features Control

0005h

Read

SCT Data Table

0006h-BFFFh

Reserved

C000h-FFFFh

Vendor Specific

Table 48 SCT Action Code List

Hitachi hard disk drive specifications
85

(Not Supported)

9.18.2.1.4

Extended Status Code

Status Code
0000h
0001h
0002h
0003h
0004h
0005h
0006h
0007h
0008h
0009h
000Ah
000Bh
000Ch
000Dh
000Eh
000Fh
0010h
0011h
0012h
0013h
0017h
0018h-BFFFh
C000h-C002h
C003h
C004h
C005h
C006h
C007h-FFEFh
FFF0h-FFFEh
FFFFh

Definition
Command complete without error
Invalid Function Code
Input LBA out of range
Request sector count overflow. The number of sectors requested to transfer
(Sector Count register) in the read or write log command is larger than required by
SCT command.
Invalid Function code in Error Recovery command
Invalid Selection code in Error Recovery command
Host read command timer is less than minimum value
Host write command timer is less than minimum value
Background SCT command was aborted because of an interrupting host command
Background SCT command was terminated because of unrecoverable error
Invalid Function code in Long Sector Access command
SCT data transfer command was issued without first issuing an SCT command
Invalid Function code in Feature Control command
Invalid Feature code in Feature Control command
Invalid New State value in Feature Control command
Invalid Option Flags in Feature Control command
Invalid SCT Action code
Invalid Table ID (table not supported)
Command was aborted due to drive security being locked
Invalid revision code
Blocking SCT Write Same command was terminated because of unrecoverable
error
Reserved
Vendor Specific
Overlay switch failure in Long Sector Access command
Read Long failure
Write Long failure
Write Cache enable failure
Vendor Specific
Reserved
SCT command executing in background

Table 49 Extended Status Code

Hitachi hard disk drive specifications
86

9.18.2.2

Data transfer

Once an SCT command has been issued, status can be checked and data can be transferred. Data transfer
uses log page E1h.

9.18.2.2.1

Read/Write SCT Data Using SMART

Command Block Output Registers
Register

7 6 5 4 3 2 1 0

Feature

D5h(Read)/D6h(Write)

Sector Count

Number of sectors to be
transferred

Sector Number

E1h

Cylinder Low

4Fh

Cylinder High

C2h

Device/Head

- D -

Command

B0h

Table 50 Input Registers of SCT Data Transfer Using SMART

9.18.2.2.2

Read/Write SCT Data Using Read/Write Log Ext

Command Block Output Registers
Register
Feature

Sector Count

LBA Low

LBA Mid

LBA High

Device/Head
Command

7 6 5 4 3 2 1 0
Current

Reserved

Current

01h

00h

Current

E1h

Reserved

Current

00h

Current

Reserved

Reserved
-

- D -

2Fh(Read)/3Fh(Write)

Table 51 Input Registers of SCT Data Transfer using Read/Write Log Ext

Hitachi hard disk drive specifications
87

9.18.2.3

SCT Status Request

Once an SCT command has been issued, a status is reported in the ATA registers. This status indicates that the
command was accepted or that an error occurred. This ATA status return does not indicate successful
completion of the SCT actions. Some commands can take several minutes or even hours to execute. In this
case, the host can determine execution progress by requesting SCT status.
Log page E0h contains the status information. Reading log page E0h retrieves the status information. The SCT
status may be acquired any time that the host is allowing to send a command to the device. This command will
not change the power state of the drive, nor terminate any background activity, including any SCT command in
progress.

9.18.2.3.1

SCT Status Request Using SMART

Command Block Output Registers
Register

7 6 5 4 3 2 1 0

Feature

D5h

Sector Count

01h

Sector Number

E0h

Cylinder Low

4Fh

Cylinder High

C2h

Device/Head

- D -

Command

B0h

Table 52 Intput Registers of SCT Status Request Using SMART

9.18.2.3.2

SCT Status Request Using Read Log Ext

Command Block Output Registers
Register
Feature

Sector Count

LBA Low

LBA Mid

LBA High

Device/Head
Command

7 6 5 4 3 2 1 0
Current

Reserved

Current

01h

00h

Current

E0h

Reserved

Current

00h

Current

Reserved

Reserved
-

- D -

2Fh

Table 53 Input Registers of SCT Status Request Using Read Log Ext

Hitachi hard disk drive specifications
88

9.18.2.3.3

Format of SCT Status Response

Byte
1:0
3:2

Type
Word
Word

Field Name
Format Version
SCT Version

Value
0003h

5:4

Word

SCT Spec.

0001h

9:6

DWord

Status Flags

Byte

Drive Status

13:11
15:14

Byte[3]
Word

reserved
Extended
Code

17:16

Word

Action Code

19:18

Word

Function Code

39:20
47:40

Byte[20]
QWord

reserved
LBA

199:48
200

Byte[152]
Byte

HDA Temp

201

Byte

Min Temp

202

Byte

Max Temp

203

Byte

Life Min Temp

204

Byte

Life Max Temp

Description
Status Response format version number
Manufacturer‟s
vendor
specific
implementation version number
Highest level of SCT Technical Report
supported
Bit 0 : Segment Initialized Flag
If this bit is set to 1, an SCT Write Same
command write to all LBAs of the drive has
completed without error. This bit shall be
cleared to 0 when any user LBA is written,
even if write cache is enabled. This bit is
alse cleared if the capacity of the drive is
changed via SETMAX, SETMAX EXT or
DCO. This bit is preserved through a power
cycle.
Bit 1-31 : Reserved
0 = Active waiting for a command
1 = Stand-by
2 = Sleep
3 = DST executing in background
4 = SMART ODC executing in background
5 = SCT executing in background

00h
Status

Status Of last SCT command issued.
FFFFh if SCT command executing in
background.
Action code of last SCT command issued. If
the Extended Status Code is FFFFh, this is
the Action Code of the command that is
current executing.
Function code of last SCT command
issued. If the Extended Status Code is
FFFFh, this is the Function Code of the
command that is current executing.
00h
Current LBA of SCT command executin in
background. If there is no command
currently executing in the background, this
field is undefined.
00h
Current HDA temperature in degrees
Celsius. This is a 2‟s complement number.
80h indicates that this value is invalid.
Minimum HDA temperature in degrees
Celsius. This is a 2‟s complement integer.
80h indicates that this value is invalid.
Maximum HDA temperature in degrees
Celsius. This is a 2‟s complement number.
80h indicates that this value is invalid.
Minimum HDA temperature in degrees
Celsius seen for the life of the device. This
is a 2‟s complement integer. 80h indicates
that this value is invalid.
Maximum HDA temperature in degrees
Celsius seen for the life of the drive. This is
a 2‟s complement number. 80h indicates
that this value is invalid.

Hitachi hard disk drive specifications
89

205
209:206

Byte
Dword

Reserved

00h

213:210

Dword

Under Limit Count

479:214
511:480

Byte[275]
Byte[32]

Reserved
Vendor Specific

Over Limit Count

Number of temperature recording Intervals
since the last power-on reset where the
recorded temperature was greater than Max
Op Limit. See table 93 for information about
this Interval.
Number of temperature recording Intervals
since the last power-on reset where the
recorded temperature was less than Min Op
Limit. See table 93 for information about this
Interval.

00h
00h

Table 54 Data Format of SCT Status Response

Hitachi hard disk drive specifications
90

9.18.3

SCT Command Set

9.18.3.1

SCT Write Same (action code : 0002h)

Inputs: (Key Sector)
Word

Name

Value

Description

Action Code

0002h

This action writes a pattern or sector of data repeatedly to
the media. This capability could also be referred to as “Write
All” or “Write Same”.

Function Code

0001h

Repeat Write Pattern (Background Operation)

0002h

Repeat Write Sector (Background Operation)

0101h

Repeat Write Pattern (Blocking Operation)

0102h

Repeat Write Sector (Blocking Operation)

5:2

Start LBA

QWord

First LBA

9:6

Count

QWord

Number of sectors to fill

11:10

Pattern

DWord

If the Function Code is 0001h, this field contains a 32-bit
pattern that is written on the media starting at the location
specified in words two through five

255:12

reserved

0000h

Table 55 SCT Write Same (Inputs)
Outputs: (TF Data)
Command Block Input Registers (Success)
Error

00h

Sector Count

Reserved

Sector Number

Reserved

Cylinder Low

Number of sectors to transfer (LSB) = 01h

Cylinder High

Number of sectors to transfer (MSB) = 00h

Device/Head

reserved

Status

50h

Table 56 SCT Write Same (Outputs)
The SCT Write Same command will begin writing sectors from Start LBA in incrementing order until Count
sectors have been written. A Count of zero means apply operation from Start LBA until the last user LBA on the
drive is reached. The HPA feature determines the last user LBA. This command will not write over a hidden
partition when hidden partitions are enabled using the Host Protected Area drive capabilities. Automatic sector
reassignment is permitted during the operation of this function.

If Start LBA or Start LBA + Count go beyond the last user LBA then an error is reported and the SCT command
is not executed. Issuing this command with a value of zero for Start LBA and Count will cause all LBAs of the
drive to be written the specified pattern.

Hitachi hard disk drive specifications
91

Once the key sector has been issued, if the Function Code was 0002h or 0102h and the TF Data indicates that
the drive is ready to receive data, log page E1h should be written to transfer the data.

This command can change the Segment Initialized Flag. If the command writes all the user addressable sectors
and completes without encountering an error or being aborted, then the “Segment Initialized Flag” (bit 0 of the
Status Flags in the SCT Status. See0) shall be set to 1. A write to any user addressable sector on the drive
(except another complete write all), shall cause the Segment Initialized Flag to be cleared. Reallocations as a
result of reading data (foreground or background) do not clear the Segment Initialized Flag.

Hitachi hard disk drive specifications
92

Implementation note for Background Operation (Function code = 0001h, 0002h)

In this mode, the drive will return command completion status when the drive finished receiving data.

Any command, including IDENTIFY DEVICE, other than SCT Status, issued to the drive while this command is
in progress will terminate the SCT Write Same command. The incoming command is executed.

Use the SCT Status command to retrieve status information about the current SCT command. Example status
information includes: command active or complete, current LBA, and errors. When this command is in progress,
the SCT status error code will be FFFFh, and set to 0000h if the command completes without error. It will be less
than FFFFh and grater the 0000h if the command terminated prematurely for any reason.

Possible Extended Status Code for Background Operation (Function code = 0001h, 0002h)
0008h

Background SCT command was aborted because of an interrupting host command

0009h

Background SCT command was terminated because of unrecoverable error

FFFFh

SCT command executing in background

Implementation note for Blocking Operation (Function code = 0101h, 0102h)

In this mode, the drive will return command completion status when the drive finished the SCT Write Same
operation.

Outputs for Error
Command Block Input Registers (Error)
Register

7 6 5 4 3 2 1 0

Error

04h

Sector Count

Extended Status code
(LSB)

Sector Number

Extended Status code
(MSB)

Cylinder Low

N/A

Cylinder High

N/A

Device/Head
Status

51h

Possible Extended Status Code for Blocking Operation (Function code = 0101h, 0102h)
0017h

Blocking SCT Write Same command was terminated because of unrecoverable
error

Hitachi hard disk drive specifications
93

9.18.3.2

Error Recovery Control command (action code : 0003h)

Inputs: (Key Sector)
Word

Name

Value

Description

Action Code

0003h

Set the read and write error recovery time

Function Code

0001h

Set New Value

0002h

Return Current Value

0001h

Read Timer

0002h

Write Timer
If the function code is 0001h, then this field contains the
recovery time limit in 100ms units. The minimum SCT
timeout value is 65 (=6.5 second). When the specified time
limit is shorter than 6.5 second,the issued command is
aborted.

Selection Code

Value

Word

255:4

reserved

0000h

Table 57 Error Recovery Control command (Inputs)
Outputs: (TF Data)
Command Block Input Registers (Success)
Error

00h

Sector Count

If Function Code was 0002h, then this is the LSB of the requested recovery limit.
Otherwise, this field is reserved.

Sector Number

If Function Code was 0002h, then this is the MSB of the requested recovery limit.
Otherwise, this field is reserved.

Cylinder Low

reserved

Cylinder High

reserved

Device/Head

reserved

Status

50h

Table 58 Error Recovery Control command (Onputs)
The Error Recovery Control command can be used to set time limits for read and write error recovery. For
non-queued commands, these timers apply to command completion at the host interface. For queued
commands where in order data delivery is enabled, these timers begin counting when the device begins to
execute the command, not when the command is sent to the device. These timers do not apply to streaming
commands, or to queued commands when out-of-order data delivery is enabled.

These command timers are volatile. The default value is 0 (i.e. disable command time-out).

Hitachi hard disk drive specifications
94

9.18.3.3

Feature Control Command (action code : 0004h)

Inputs: (Key Sector)
Word

Name

Value

Description

Action Code

0004h

Set or return the state of drive features described in 0

Function Code

0001h

Set state for a feature

0002h

Return the current state of a feature

0003h

Return feature option flags

Feature Code

Word

See 0 for a list of the feature codes

State

Word

Feature code dependent value

Option Flags

Word

Bit15:1 = Reserved

If the function code is 0001h, setting bit 0 to one causes the
requested feature state change to be preserved across
power cycles.

If the function code is 0001h, setting bit 0 to zero causes the
requested feature state change to be volatile. A hard reset
causes the drive to revert to default, or last non-volatile
setting.
255:5

reserved

0000h

Table 59 Feature Control command (Inputs)
Outputs: (TF Data)
Command Block Input Registers (Success)
Error

00h

Sector Count

If Function Code was 0002h, then this is the LSB of Feature State.
If Function Code was 0003h, then this is the LSB of Option Flags.
Otherwise, this field is reserved.

Sector Number

If Function Code was 0002h, then this is the MSB of Feature State.
If Function Code was 0003h, then this is the MSB of Option Flags.
Otherwise, this field is reserved.

Cylinder Low

reserved

Cylinder High

reserved

Device/Head

reserved

Status

50h

Table 60 Feature Control command (Outputs)

Hitachi hard disk drive specifications
95

Feature Code

State Definition

0001h

0001h : Allow write cache operation to be determined by Set Feature command
0002h : Force write cache enabled
0003h : Force write cache disabled

If State 0001h is selected, the ATA Set Feature command will determine the operation
state of write cache. If State 0002h or 0003h is selected, write cache will be forced into
the corresponding operation state, regardless of the current ATA Set Feature state.
Any attempt to change the write cache setting through Set Feature shall be accepted,
but otherwise ignored, and not affect the operation state of write cache and complete
normally without reporting an error.

In all cases, bit 5 of word 85 in the Identify Device information will reflect the true
operation state of write cache, one indicating enabled and zero indicating disabled.

The default state is 0001h.
0002h

0001h : Enable Write Cache Reordering
0002h : Disable Write Cache Reordering

The default state is 0001h.

The drive does not return error for setting state 0002h, but the state is ignored.
0003h

Set time interval for temperature logging.

0000h is invalid.
0001h to FFFFh logging interval in minutes.

This value applies to the Absolute HDA Temperature History queue. Issuing this
command will cause the queue to be reset and any prior values in the queue will be
lost. Queue Index shall be set to zero and the first queue location will be set to the
current value. All remaining queue locations are set to 80h. The Sample Period, Max
Op Limit, Over Limit, Min Op Limit and Under Limit values are preserved.

Default value is 0001h.
0004h-CFFFh

Reserved

D000h-FFFFh

Vendor Specific

Table 61 Feature Code List

Hitachi hard disk drive specifications
96

9.18.3.4

SCT Data Table Command (action code : 0005h)

Inputs: (Key Sector)
Word

Name

Value

Description

Action Code

0005h

Read a data table

Function Code

0001h

Read Table

Table ID

Word

See 0 for a list of data tables

255:2

reserved

0000h

Table 62 SCT Data Table command (Inputs)
Outputs: (TF Data)
Command Block Input Registers (Success)
Error

00h

Sector Count

reserved

Sector Number

reserved

Cylinder Low

Number of sectors to transfer (LSB) = 01h

Cylinder High

Number of sectors to transfer (MSB) = 00h

Device/Head

reserved

Status

50h

Table 63 SCT Data Table command (Outputs)

Table ID

Description

0000h

Invalid

0001h

Reserved

0002h

HDA Temperature History Table (in absolute degree C). See 0

0003h-CFFFh

Reserved

D000h-FFFFh

Vendor Specific

Table 64 Table ID

Hitachi hard disk drive specifications
97

Byte

Size

Field Name

Description

1:0

Word

Format
Version

Data table format version (=0002h)

3:2

Word

Sampling
Period

Absolute HDA Temperature sampling period
in minutes.
0000h indicates sampling is disabled.

5:4

Word

Interval

Timer interval between entries in the history
queue.

Byte

Max Op Limit

Maximum recommended continuous
operating temperature. This is a one byte 2‟s
complement number that allows a range
from -127°C to +127°C to be specified. 80h
is an invalid value. This is a fixed value.

Byte

Over Limit

Maximum temperature limit. This is a one
byte 2‟s complement number that allows a
range from -127°C to +127°C to be
specified. 80h is an invalid value. This is a
fixed value.

Byte

Min Op Limit

Minimum recommended continuous
operating limit. This is a one byte 2‟s
complement number that allows a range
from -127°C to +127°C to be specified. 80h
is an invalid value. This is a fixed value.

Byte

Under Limit

Minimum temperature limit. This is a one
byte 2‟s complement number that allows a
range from -127°C to +127°C to be
specified. 80h is an invalid value. This is a
fixed value.

29:10

Byte[20]

Reserved

31:30

Word

Queue Size

Number of entry locations in history queue.
This value is 128.

33:32

Word

Queue Index

Last updated entry in queue. Queue Index is
zero-based, so Queue Index 0000h is the
first location in the buffer (at offset 34). The
most recent temperature entered in the
buffer is at Queue Index + 34.
See Note 1 and Note 2.

Hitachi hard disk drive specifications
98

(Queue Size+33):34

Byte[Queue Size]

Queue Buffer

This is a circular buffer of absolute HDA
Temperature values. These are one byte 2‟s
complement numbers, which allow a range
from -127°C to +127°C to be specified. A
value of 80h indicates an initial value or a
discontinuity in temperature recording.

The Actual time between samples may vary
because commands may not be interrupted.
The sampling period is the minimum time
between samples. See Not 1.

If the host changes the logging interval using
the volatile option, the interval between
entries in the queue may change between
power cycles with no indication to the host.
511:(Queue Size
+34)

Byte[512-Queue
Size-34]

Reserved

Note 1 – The Absolute HDA Temperature History is preserved across power cycles with the requirement
that when the drive powers up, a new entry is made in the history queue of 80h, an invalid absolute
temperature value. This way an application viewing the history can see the discontinuity in temperature
result from the drive being turned off.

Note 2 – When the Absolute HDA Temperature history is cleared, for new drives or after changing the
Logging Interval, the Queue Index shall be set to zero and the first queue location shall be set to the current
Absolute HDA Temperature value. All remaining queue locations are set to 80h.

Table 65 Data Format of HDA Absolute Temperature History Table

Hitachi hard disk drive specifications
99

Command Protocol

The commands are grouped into different classes according to the protocols followed for command execution.
The command classes with their associated protocols are defined below.
Please refer to Serial ATA Revision 1.0a (Section 9. device command layer protocol) and Serial ATA II:
Extensions to Serial ATA 1.0a (Section 4. Command layer) about each protocol.
For all commands, the host must first check if BSY=1, and should proceed no further unless and until BSY=0.
For all commands, the host must also wait for RDY=1 before proceeding.
A device must maintain either BSY=1 or DRQ=1 at all times until the command is completed. The INTRQ signal
is used by the device to signal most, but not all, times when the BSY bit is changed from 1 to 0 during command
execution.
A command shall only be interrupted with a COMRESET or software reset. The result of writing to the Command
register while BSY=1 or DRQ=1 is unpredictable and may result in data corruption. A command should only be
interrupted by a reset at times when the host thinks there may be a problem, such as a device that is no longer
responding.
Interrupts are cleared when the host reads the Status Register, issues a reset, or writes to the Command
Register.
The device timeout values are described in the Section12 on the page 254.

10.1 PIO Data In commands
These commands are:













Device Configuration Identify
Identify Device
Read Buffer
Read Log Ext
Read Multiple
Read Multiple Ext
Read Sector(s)
Read Sector(s) Ext
Read Stream PIO
SMART Read Attribute Values
SMART Read Attribute Thresholds
SMART Read Log Sector

Execution includes the transfer of one or more 512 byte sectors of data from the device to the host.

Hitachi hard disk drive specifications
100

10.2 PIO Data Out commands
These commands are:



















Device Configuration Set
Download Microcode
Format Track
Security Disable Password
Security Erase Unit
Security Set Password
Security Unlock
Set Max Set Password command
Set Max Unlock command
SMART Write Log Sector
Write Buffer
Write Log Ext
Write Multiple
Write Multiple Ext
Write Multiple FUA Ext
Write Sector(s)
Write Sector(s) Ext
Write Stream PIO

Execution includes the transfer of one or more 512 byte sectors of data from the host to the device.

10.3 Non-Data commands
These commands are:





























Check Power Mode
Configure Stream
Device Configuration Freeze Lock
Device Configuration Restore
Execute Device Diagnostic
Flush Cache
Flush Cache Ext
Idle
Idle Immediate
Initialize Device Parameters
NOP
Read Native Max Address
Read Native Max Address Ext
Read Verify Sector(s)
Read Verify Sector(s) Ext
Recalibrate
Security Erase Prepare
Security Freeze Lock
Seek
Set Features
Set Max Address
Set Max Address Ext
Set Max Lock command
Set Max Freeze Lock command
Set Multiple Mode
Sleep
SMART Disable Operations
SMART Enable/Disable Attribute Autosave

Hitachi hard disk drive specifications
101










SMART Enable Operations
SMART Execute Off-line Data Collection
SMART Return Status
SMART Save Attribute Values
SMART Enable/Disable Automatic Off-Line
Standby
Standby Immediate
Write Uncorrectable Ext

Execution of these commands involves no data transfer.

10.4 DMA Data In commands and DMA Data Out commands
These commands are:








Read DMA
Read DMA Ext
Read Stream DMA
Write DMA
Write DMA Ext
Write DMA FUA Ext
Write Stream DMA

Execution of this class of command includes the transfer of one or more blocks of data between the device and
the host using DMA transfer.

10.5 First-party DMA commands
These commands are:


Read FPDMA Queued



Write FPDMA Queued

Execution of this class of commands includes command queuing and the transfer of one or more blocks of data
between the device and the host. The protocol is described in the section 4.2 “Native Command Queuing” of
“Serial ATA II: Extensions to Serial ATA 1.0a”.
Host knowledge of I/O priority may be transmitted to the device as part of the command. There are two priority
classes for NCQ command as high priority, the host is requesting a better quality of service for that command
than the commands issued with normal priority.
The classes are forms of soft priority. The device may choose to complete a normal priority command before an
outstanding high priority command, although preference shallbe given to the high priority commands. The
priority class is indicated in bit 7 (Priority Information) in the Sector Count register for NCQ commands (READ
FPDMA QUEUED and WRITE FPDMA QUEUED). This bit can indicate either the normal priority or high priority
class. If a command is marked by the host as high priority, the device shall attempt to provide better quality of
service for the command. It is not required that devices process all high priority requests before satisfying
normal priority requests.

Hitachi hard disk drive specifications
102

Command Descriptions

Protocol
3
3
3
3
3
1
2
2
3
3
3
2
1
3
3
3
3
3
1
4
4
4
5
1
1
1
3
3
1
1
1
4
4
3
3
3
3
2
3
2
3
2
2

Command
Check Power Mode
Check Power Mode*
Configure Stream
Device Configuration Restore
Device Configuration Freeze Lock
Device Configuration Identify
Device Configuration Set
Download Microcode
Execute Device Diagnostic
Flush Cache
Flush Cache Ext
Format Track
Identify Device
Idle
Idle*
Idle Immediate
Idle Immediate*
Initialize Device Parameters
Read Buffer
Read DMA
Read DMA
Read DMA Ext
Read FPDMA Queued
Read Log Ext
Read Multiple
Read Multiple Ext
Read Native Max Address
Read Native Max Address Ext
Read Sector(s)
Read Sector(s)
Read Sector(s) Ext
Read Stream DMA
Read Stream PIO
Read Verify Sector(s)
Read Verify Sector(s)
Read Verify Sector(s) Ext
Recalibrate
Security Disable Password
Security Erase Prepare
Security Erase Unit
Security Freeze Lock
Security Set Password
Security Unlock

Code
(Hex)
E5
98
51
B1
B1
B1
B1
92
90
E7
EA
50
EC
E3
97
E1
95
91
E4
C8
C9
25
60
2F
C4
29
F8
27
20
21
24
2A
2B
40
41
42
1x
F6
F3
F4
F5
F1
F2

Binary Code Bit
7
1
1
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1

Table 66 Command Set

Hitachi hard disk drive specifications
103

6
1
0
1
0
0
0
0
0
0
1
1
1
1
1
0
1
0
0
1
1
1
0
1
0
1
0
1
0
0
0
0
0
0
1
1
1
0
1
1
1
1
1
1

5
1
0
0
1
1
1
1
0
0
1
1
0
1
1
0
1
0
0
1
0
0
1
1
1
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
1
1

4
0
1
1
1
1
1
1
1
1
0
0
1
0
0
1
0
1
1
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1

3
0
1
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
1
0
0
1
0
1
1
0
0
0
0
1
1
0
0
0
1
0
0
0
0
0

2
1
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
1
0
0
1
0
0
1
0
0
0
0
0
0
0
1
1
0
0

1
0
0
0
0
0
0
0
1
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
1
0
0
0
1

0
1
0
1
1
1
1
1
0
0
1
0
0
0
1
1
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
0
0
1
0
0
1
0
1
1
0

Protocol
3
3
3
3
3
3
3
3
3
3
3
1
1
3
3
2
3
3
3
3
3
2
4
4
4
4
5
2
2
2
2
2
2
2
4
4
3

Command
Seek
Set Features
Set Max Address
Set Max Address Ext
Set Multiple Mode
Sleep
Sleep*
SMART Disable Operations
SMART Enable/Disable Attribute Auto save
SMART Enable Operations
SMART Execute Off-line Data Collection
SMART Read Attribute Values
SMART Read Attribute Thresholds
SMART Return Status
SMART Save Attribute Values
SMART Write Log Sector
SMART Enable/Disable Automatic Off-line
Standby
Standby*
Standby Immediate
Standby Immediate*
Write Buffer
Write DMA
Write DMA
Write DMA Ext
Write DMA FUA Ext
Write FPDMA Queued
Write Log Ext
Write Multiple
Write Multiple Ext
Write Multiple FUA Ext
Write Sector(s)
Write Sector(s)
Write Sector(s) Ext
Write Stream DMA
Write Stream PIO
Write Uncorrectable Ext
Protocol :

1:
2:
3:
4:
5:
+:

Code
(Hex)
7x
EF
F9
37
C6
E6
99
B0
B0
B0
B0
B0
B0
B0
B0
B0
B0
E2
96
E0
94
E8
CA
CB
35
3D
61
3F
C5
39
CE
30
31
34
3A
3B
45

7
0
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
0
1
0
0
0
0
0
0

6
1
1
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
1
1
0
0
1
0
1
0
1
0
0
0
0
0
1

Binary Code
Bit
5
4
3
2
1
1
1
0
1
1
1
1
1
0
1
1
0
1
0
0
0
1
1
0
0
1
0
1
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
0
0
0
1
0
1
1
0
0
0
0
1
0
1
1
0
1
0
0
0
1
0
0
0
1
0
1
1
0
1
1
1
1
1
1
0
0
0
1
1
1
1
0
0
0
1
1
1
1
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
0
0
0
0
1

PIO data IN command
PIO data OUT command
Non data command
DMA command
Vendor specific command

Table 67 Command Set --Continued-Commands marked * are alternate command codes for previous defined commands.

Hitachi hard disk drive specifications
104

1
1
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
1
1
0
0
0
1
0
0
1
0
0
0
1
1
0

0
1
1
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
1
0
0
1
1

Command (Subcommand)

Command code
(Hex)

Feature
Register
(Hex)

B0
B0
B0
B0
B0
B0
B0
B0
B0
B0
B0

D0
D1
D2
D3
D4
D5
D6
D8
D9
DA
DB

EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF

02
03
05
06
07
55
66
82
85
86
AA
CC

(SMART Function)
SMART Read Attribute Values
SMART Read Attribute Thresholds
SMART Enable/Disable Attribute Autosave
SMART Save Attribute Values
SMART Execute Off-line Data Collection
SMART Read Log
SMART Write Log
SMART Enable Operations
SMART Disable Operations
SMART Return Status
SMART Enable/Disable Automatic Off-line
(Set Features)
Enable Write Cache
Set Transfer Mode
Enable Advanced Power Management
Enable Power-up in Standby Feature Set
Power-up in Standby Feature Set Device Spin-up
Disable read look-ahead feature
Disable reverting to power on defaults
Disable write cache
Disable Advanced Power Management
Disable Power-up in Standby Feature Set
Enable read look-ahead feature
Enable reverting to power on defaults

Table 68 Command Set (Subcommand)
Table 66 Command Set on the page 103 and Table 67 Command Set --Continued-- on the page 104 show
the commands that are supported by the device. Table 68 Command Set (Subcommand) on the page 105
shows the sub-commands they are supported by each command or feature.

Hitachi hard disk drive specifications
105

The following symbols are used in the command descriptions:
Output Registers
0
Indicates that the bit must be set to 0.
1
Indicates that the bit must be set to 1.
D The device number bit. Indicates that the device number bit of the Device/Head Register should be
specified. This bit is reserved since all Serial ATA devices behave like Device 0.
H

Head number. Indicates that the head number part of the Device/Head Register is an output parameter
and should be specified.

LBA mode.
mode.

Retry. Original meaning is already obsoleted, there is no difference between 0 and 1. (Using 0 is
recommended for future compatibility.)

Option Bit. Indicates that the Option Bit of the Sector Count Register should be specified. (This bit is used
by Set Max ADDRESS command)

Indicates the addressing mode. Zero specifies CHS mode and one does LBA addressing

V Valid. Indicates that the bit is part of an output parameter and should be specified.
x
Indicates that the hex character is not used.
Indicates that the bit is not used.
Input Registers
0
Indicates that the bit is always set to 0.
1
Indicates that the bit is always set to 1.
H Head number. Indicates that the head number part of the Device/Head Register is an input parameter and
will be set by the device.
V
-

Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1 by the device.
Indicates that the bit is not part of an input parameter.

The command descriptions show the contents of the Status and Error Registers after the device has completed
processing the command and has interrupted the host.
Please refer to ATA interface specifications about other commands‟ descriptions which are not described in this
SATA interface specification. However, be careful that Serial ATA Device/Head register bit-4 (d) is different
from that of Parallel ATA. In Serial ATA, Device/Head register bit-4 is reserved for all commands.

Hitachi hard disk drive specifications
106

11.1 Check Power Mode (E5h/98h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

CRC

UNC

IDN

...See Below...

Error Register
7

Status Register
2

ABT T0N
V

AMN

BSY

RDY DF
V

DSC DRQ COR IDX ERR
-

Table 69 Check Power Mode Command (E5h/98h)
The Check Power Mode command will report whether the device is spun up and the media is available for
immediate access.
Input Parameters From The Device
Sector Count

The power mode code. The command returns 0 in the Sector Count Register if the
device is in Standby or Sleep mode. Otherwise, the Sector Count Register will be set to
0FFh.

Hitachi hard disk drive specifications
107

11.2 Configure Stream (51h)
Command Block Output Registers

Command Block Input Registers

7 6 5 4 3 2 1 0

Data Low

Data High

Current

Device/Head

Command

Status

Feature
Sector Count
Sector Number

Cylinder Low

Cylinder High

...See Below...

Error
Sector Count
Sector Number

Cylinder Low

Cylinder High

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 70 Configure Stream Command (51h)
The Configure Stream command specifies the operating parameters of an individual stream. A Configure
Stream command may be issued for each stream that is to be added or removed from the current operating
configuration. If A/R = 1 and the specified ID is already valid at the device, the new parameters shall replace the
old parameters, unless Command Abort is returned (see abort conditions for Error Register). In this case the old
parameters for the specified Stream ID shall remain in effect.
Abort conditions for Error register are the following.



The device does not support the Streaming Feature Set.
A/R is cleared to zero and the Feature field contains a Stream ID that has not been sent in a previous
CONFIGURE STREAM command.

Hitachi hard disk drive specifications
108

Output Parameters To The Device
Feature Current bit 7 (A/R)

Feature Current

bit 6 (R/W)

Feature Current bit 0..2 (Stream ID)
Feature Previous

If set to one, a request to add a new stream.
If cleared to zero, a request to remove a previous configured
stream is specified.
R/W specifies a read stream if cleared to zero and a write stream
if set to one.
The Stream ID shall be a value between 0 and 7.
The default Command Completion Time Limit (CCTL).
The value is calculated as follows:
(Default CCTL) = ((content of the Features register)*
(Identify Device words (99:98))) micriseconds.
This time shall be used by the device when a streaming
command with the same stream ID and a CCTL of zero are
issued. The time is measured from the write of the command
register to the final INTRQ for command completion. The device

has minimum CCTL value. When the specified value is
shorter than the minimum value, CCTL is set to the
minimum value. Actual minimum CCTL value is described
in the “Deviations from Standard” section.
Sector Count Current

Allocation Unit Size In Sectors (7:0)

Sector Count Previous

Allocation Unit Size In Sectors (15:8)

Hitachi hard disk drive specifications
109

11.3 Device Configuration Overlay (B1h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
V

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 71 Device Configuration Overlay Command (B1h)
Individual Device Configuration Overlay feature set commands are identified by the value placed in the Features
register. The table below shows these Features register values.
Value

Command

C0h

DEVICE CONFIGURATION RESTORE

C1h

DEVICE CONFIGURATION FREEZE LOCK

C2h

DEVICE CONFIGURATION IDENTIFY

C3h

DEVICE CONFIGURATION SET

other

Reserved

Table 72 Device Configuration Overlay Features register values

11.3.1

Device Configuration Restore (Subcommand C0h)

The Device Configuration Restore command disables any setting previously made by a Device Configuration
Set command and returns the content of the Identify Device or Identify Packet Device command response to the
original settings as indicated by the data returned from the execution of a Device Configuration Identify
command.

Hitachi hard disk drive specifications
110

11.3.2

Device Configuration Freeze Lock (Subcommand C1h)

The Device Configuration Freeze Lock command prevents accidental modification of the Device Configuration
Overlay settings. After successful execution of a Device Configuration Freeze Lock command, all Device
Configuration Set, Device Configuration Freeze Lock, Device Configuration Identify, and Device Configuration
Restore commands are aborted by the device. The Device Configuration Freeze Lock condition shall be cleared
by a power-down. The Device Configuration Freeze Lock condition shall not be cleared by hardware or software
reset.

11.3.3

Device Configuration Identify (Subcommand C2h)

The Device Configuration Identify command returns a 512 byte data structure via PIO data-in transfer. The
content of this data structure indicates the selectable commands, modes, and feature sets that the device is
capable of supporting. If a Device Configuration Set command has been issued reducing the capabilities, the
response to an Identify Device or Identify Packet Device command will reflect the reduced set of capabilities,
while the Device Configuration Identify command will reflect the entire set of selectable capabilities.
The format of the Device Configuration Overlay Data structure is shown on next page.

11.3.4

Device Configuration Set (Subcommand C3h)

The Device Configuration Set command allows a device manufacturer or a personal computer system
manufacturer to reduce the set of optional commands, modes, or feature sets supported by a device as
indicated by a Device Configuration Identify command. The Device Configuration Set command transfers an
overlay that modifies some of the bits set in words 63, 82, 83, 84, and 88 of the Identify Device command
response. When the bits in these words are cleared, the device no longer supports the indicated command,
mode, or feature set. If a bit is set in the overlay transmitted by the device that is not set in the overlay received
from a Device Configuration Identify command, no action is taken for that bit.
The format of the overlay transmitted by the device is described in the table on next page. The restrictions on
changing these bits are described in the text following that table. If any of the bit modification restrictions
described are violated or any setting is changed with Device Configuration Set command, the device shall return
command aborted. At that case, error reason code is returned to sector count register, invalid word location is
returned to cylinder high register, and invalid bit location is returned to cylinder low register. The Definition of
error information is shown on page 113.
Error Information Example 1:
After establish a protected area with Set Max address, if a user attempts to change maximum LBA address
(Device Configuration Set or Device Configuration Restore), device shall abort that command and return error
reason code as below.
Cylinder high

03h

= word 3 is invalid

Cylinder low
Sector Number

:
:

00h
00h

this register is not assigned in this case
this register is not assigned in this case

Sector count

06h

= Protected area is now established

Error Information Example 2:
When device is enabled the Security feature set, if user attempts to disable that feature, device abort that
command and return error reason code as below.
Cylinder high

07h

= word 7 is invalid

Cylinder low

00h

= bit 8-15 are valid

Sector Number

08h

= bit 3 is invalid

Sector count

04h

= now Security feature set is enabled

Hitachi hard disk drive specifications
111

Word
0
1

3-6
7

9-20
21

22-254
255

Content
0002h
Data Structure revision
Multiword DMA modes supported
15-3 Reserved
2

1 = Multiword DMA mode 2 and below are supported

1 = Multiword DMA mode 1 and below are supported

1 = Multiword DMA mode 0 is supported

Ultra DMA modes supported
15-7 Reserved
6

1 = Ultra DMA mode 6 and below are supported

1 = Ultra DMA mode 5 and below are supported

1 = Ultra DMA mode 4 and below are supported

1 = Ultra DMA mode 3 and below are supported

1 = Ultra DMA mode 2 and below are supported

1 = Ultra DMA mode 1 and below are supported

1 = Ultra DMA mode 0 is supported

Maximum LBA address
Command set/feature set supported
15 0 = Reserved
14

0 = Reserved

1 = SMART Selective self-test is supported

1 = Forced Unit Access is supported

0 = Reserved

1 = Streaming feature set is supported

1 = 48-bit Addressing feature set supported

1 = Host Protected Area feature set supported

0 = Reserved

1 = Read/Write DMA Queued commands supported

1 = Power-up in Standby feature set supported

1 = Security feature set supported

1 = SMART error log supported

1 = SMART self-test supported

1 = SMART feature set supported

Serial ATA command / feature sets supported
15-5 Reserved
4 1 = Supports software settings preservation
3 Reserved
2 1 = Supports interface power management
1 1 = Supports non-zero buffer offset in DMA Setup FIS
0 1 = Supports native command queuing
Reserved
15-14 Reserved
13 1 = Support for WRITE UNCORRECTABLE is allowed
12-0 Reserved
Reserved
Integrity word

15-8
Checksum
7-0

Signature (A5h)

Table 73 Device Configuration Overlay Data structure
Hitachi hard disk drive specifications
112

Note.
Bits 7:0 of this word contain the value A5h. Bits 15:8 of this word contain the data structure checksum. The data
structure checksum is the two's complement of the sum of all byte in words 0 through 254 and the byte
consisting of bits 7:0 of word 255. Each byte is added with unsigned arithmetic, and overflow is ignored. The
sum of all bytes is zero when the checksum is correct.

Cylinder high

invalid word location

Cylinder low

invalid bit location (bits (15:8))

Sector number

invalid bit location (bits (7:0))

Sector count

error reason code & description
01h

DCO feature is frozen

02h

Device is now Security Locked mode

03h

Device's feature is already modified with DCO

04h

User attempt to disable any feature enabled

05h

Device is now SET MAX Locked or Frozen mode

06h

Protected area is now established

07h

DCO is not supported

08h

Subcommand code is invalid

FFh

other reason

Table 74 DCO error information definition

Hitachi hard disk drive specifications
113

11.4 Download Microcode (92h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

SUBCOMMAND(00-07)

...See Below...

Sector Count

SECTOR_COUNT(00-07)

Sector Count

Sector Number

SECTOR_COUNT(08-15)

Sector Number

Cylinder Low

BUFFER_OFFSET(00-07)

Cylinder Low

Cylinder High

BUFFER_OFFSET(08-15)

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY

5
DF

DSC DRQ COR IDX ERR
1

Table 75 Download Microcode Command (92h)

Output Parameters To The Device
Feature

Subcommand code.
03h : Download and save microcode with offsets.
07h : Download and save microcode.
Other values are reserved.

Sector Count

Lower byte of 16-bit sector count value to transfer from the host.

Sector Number

Higher byte of 16-bit sector count value to transfer from the host.

Cylinder

Buffer offset (only used for Feature = 03h)

This command enables the host to alter the device's microcode. The data transferred using the DOWNLOAD
MICROCODE commands is vendor specific.
All transfers shall be an integer multiple of the sector size. The size of the data transfer is determined by the
contents of the Sector Number and Sector Count registers. The Sector Number register is used to extend the
Sector Count register to create a 16-bit sector count value. The Sector Number register is the most significant
eight bits and the Sector Count register is the least significant eight bits. A value of zero in both the Sector

Hitachi hard disk drive specifications
114

Number and Sector Count registers shall indicate no data is to be transferred.
ABT will be set to 1 in the Error Register if the value in the Feature register is neither 03h nor 07h, or the device
is in Security Locked mode. When the reload of new microcode is requested in the data sent by the host for this
Download command, UNC error will be set to 1 in the Error Register if the device fails to reload new microcode.
This error is reported only when the reload of microcode is requested.
In reloading new microcode, when the spin-up of the device is disabled, the device spins down after reloading
new microcode.
A Features register value of 03h indicates that the microcode will be transferred in two or more Download
Microcode commands using the offset transfer method. The buffer offset value is defined by the value in
Cylinder registers. The buffer offset value is the starting location in the microcode file, which varies in 512 byte
increments.
All microcode segments shall be sent to the device in sequence.
The device may abort the DOWNLOAD MICROCODE command and discard all previously downloaded
Microcode, if the current buffer offset is not equal to the sum of the previous DOWNLOAD MICROCODE
command buffer offset and the previous sector count. The first DOWNLOAD MICROCODE command shall
have a buffer offset of zero.
The new firmware should become effective immediately after the transfer of the last data segment has
completed.
When the device detects the last download microcode command for the firmware download the device shall
perform any device required verification and save the complete set of downloaded microcode.
If the device receives a command other than download microcode prior to the receipt of the last segment the
new command is executed and all previously downloaded microcode is discarded.
If a software or hardware Reset is issued to the device before all of the microcode segments have been
transferred to the device the device shall abandon all of the microcode segments received and process the
Reset.

Hitachi hard disk drive specifications
115

11.5 Execute Device Diagnostic (90h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register

Status Register
7

Diagnostic Code

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
-

0
ERR
0

Table 76 Execute Device Diagnostic Command (90h)

The Execute Device Diagnostic command performs the internal diagnostic tests implemented by the device. The
results of the test are stored in the Error Register.
The normal Error Register bit definitions do not apply to this command. Instead, the register contains a
diagnostic code. See Table 35 Diagnostic Codes” on the page 55 for its definition.

Hitachi hard disk drive specifications
116

11.6 Flush Cache (E7h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX ERR
V

Table 77 Flush Cache Command (E7h)

This command causes the device to complete writing data from its cache.
The device returns good status after data in the write cache is written to disk media.

Hitachi hard disk drive specifications
117

11.7 Flush Cache Ext (EAh)
Command Block Output Registers

Command Block Input Registers

7 6 5 4 3 2 1 0

Data Low

Data High

Current

Error

Current

...See Below...

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

D -

Command

1 1 1 0 1 0 1 0

Device/Head
Status

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

Table 78 Flush Cache Ext Command (EAh)
This command causes the device to complete writing data from its cache.
The device returns good status after data in the write cache is written to disk media.

Hitachi hard disk drive specifications
118

DRQ COR
-

IDX

ERR

11.8 Format Track (50h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 79 Format Track Command(50h)
The Format Track command formats a single logical track on the device. Each good sector of data on the track
will be initialized to zero with write operation. At this time, whether the sector of data is initialized correctly is not
verified with read operation. Any data previously stored on the track will be lost.
The host may transfer a sector of data containing a format table to the device. But the device ignores the format
table and writes zero to all sectors on the track regardless of the descriptors.
Since device performance is optimal at 1:1 interleave, and the device uses relative block addressing internally,
the device will always format a track in the same way no matter what sector numbering is specified in the format
table.

Hitachi hard disk drive specifications
119

Output Parameters To The Device
Sector Number

In LBA mode, this register specifies LBA address bits 0 - 7 to be formatted. (L=1)

Cylinder High/Low

The cylinder number of the track to be formatted. (L=0)
In LBA mode, this register specifies LBA address bits 8-15 (Low), 16-23 (High) to be
formatted. (L=1)

The head number of the track to be formatted. (L=0)
In LBA mode, this register specifies LBA address bits 24-27 to be formatted. (L=1)

Input Parameters From The Device
Sector Number

In LBA mode, this register specifies current LBA address bits 0-7. (L=1)

Cylinder High/Low

In LBA mode, this register specifies current LBA address bits 8-15 (Low), 16-23
(High)

In LBA mode, this register specifies current LBA address bits 24-27. (L=1)

Error

The Error Register. An Abort error (ABT=1) will be returned when LBA out of range.

In LBA mode, this command formats a single logical track including the specified LBA.

Hitachi hard disk drive specifications
120

11.9 Format Unit (F7h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 80 Format Unit Command (F7h)
The Format Unit command initializes all user data sectors after merging reassigned sector location into the
defect information of the device and clearing the reassign information. Both new reassign information and new
defect information are available right after command completion of this command. Previous information of
reassign and defect are erased from the device by executing this command.
Note that the Format Unit command initializes from LBA 0 to Native MAX LBA regardless of setting by Initialize
Device Parameter (91h) command, Device Configuration Overlay, or Set Max Address (F9h) command, so the
protected area defined by these commands is also initialized.
Security Erase Prepare (F3h) commands should be completed just prior to the Format Unit command. If the
device receives a Format Unit command without a prior Security Erase Prepare command, the device aborts the
Format Unit command.
All values in Feature register are reserved, and any values other than 11h should not be put into Feature
register.
This command does not request to data transfer.
Command execution time depends on drive capacity. To determine command timeout value, Word 89 of Identify
Device data should be referred.

Hitachi hard disk drive specifications
121

11.10 Identify Device (ECh)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
-

IDX

ERR

Table 81 Identify Device Command (ECh)
The Identify Device command requests the device to transfer configuration information to the host. The device
will transfer a sector to the host containing the information described in the following pages.

Hitachi hard disk drive specifications
122

Word
00

Content
045AH
or
045EH

Description
Drive classification, bit assignments:
15 (=0): 1=ATAPI device, 0=ATA device
14 - 8 : retired
7 (=0): 1=removable cartridge device
6 (=1): 1=fixed device
5 - 3 : retired
2 (=0): Response incomplete
1 : retired
0 (=0): Reserved
Number of cylinders in default translate mode
Specific Configuration
Need Set Feature for spin-up after power-up
37C8H:
Identify Device is incomplete
Need Set Feature for spin-up after power-up
738CH:
Identify Device is complete
No Need Set Feature for spin-up after power-up
8C73H:
Identify Device is incomplete
No Need Set Feature for spin-up after power-up
C837H:
Identify Device is complete
Number of heads in default translate mode
Reserved
Reserved
Number of sectors per track in default translate mode
Number of bytes of sector gap
Number of bytes in sync field
Reserved
Serial number in ASCII (0 = not specified)
Controller type:
0003: dual ported, multiple sector buffer with look-ahead read
Buffer size in 512-byte increments

01
02

xxxxH
C837H

03
04
05
06
07
08
09
10-19
20

00xxH
0
0
003FH
0000H
0000H
0000H
XXXX
0003H

XXXXH

0038H

* Number of ECC bytes for the device

23-26
27-46
47

XXXX
XXXX
8010H

4000H

*
*
*
*
*
*

Microcode version in ASCII
Model number in ASCII
15-8 : 80h
Maximum number of sectors that can be transferred per interrupt on Read
7-0 :
and Write Multiple commands
Trusted Computing feature set options
15(=0) : Shall be cleared to zero
14(=1) : Shall be set to one
13-1(=0) : Reserved for the Trusted Computing Group
0(=0) : 0=Trusted Computing feature set is not supported

Table 82 Identify device information

Hitachi hard disk drive specifications
123

Word
49

Content
xF00H

4000H

0200H

0007H

54
55
56

xxxxH
xxxxH
xxxxH

57-58

xxxxH

0xxxH

60-61

xxxxH

62
63

0000H
xx07H

0003H

0078H

Description
Capabilities, bit assignments:
15-14 (=0)
Reserved
13
Standby timer
(=1) values as specified in ATA standard are supported
(=0) values are vendor specific
12 (=0) Reserved
11 (=1) IORDY Supported
10 (=1) IORDY can be disabled
9 (=1) LBA supported
8 (=1) DMA supported
7- 0 (=0) Reserved
Capabilities, bit assignments:
15-14(=01) word 50 is valid
13- 1 (=0) Reserved
0
Minimum value of Standby timer
(=0) less than 5 minutes
PIO data transfer cycle timing mode
DMA data transfer cycle timing mode
* Refer Word 62 and 63
Validity flag of the word
15- 8(=0): Free-fall Control Sensitivity
00h = Vendor‟s recommended setting
7-3(=0): Reserved
2(=1): 1=Word 88 is Valid
1(=1): 1=Word 64-70 are Valid
0(=1): 1=Word 54-58 are Valid
Number of current cylinders
Number of current heads
Number of current sectors per track
Current capacity in sectors
Word 57 specifies the low word of the capacity
Current Multiple setting. bit assignments
15- 9 (=0) Reserved
8 1= Multiple Sector Setting is Valid
7- 0 xxh = Current setting for number of sectors
Total Number of User Addressable Sectors
Word 60 specifies the low word of the number
FFFFFFFh=The 48-bit native max address is greater than 268,435,455
Multiword DMA Transfer Capability
15- 8
Multi word DMA transfer mode active
7- 0 (=7) Multi word DMA transfer modes supported
(support mode 0,1 and 2)
Flow Control PIO Transfer Modes Supported
15-8(=0) Reserved
7-0 (=3) Advanced PIO Transfer Modes Supported
'11' = PIO Mode 3 and 4 Supported
Minimum Multiword DMA Transfer Cycle Time Per Word
15-0(=78) Cycle time in nanoseconds (120ns, 16.6MB/s)

Table 83 Identify device information --Continued--

Hitachi hard disk drive specifications
124

Word

Content

0078H

69-74
75

0000H
001FH

170xH

000xH

005EH

0040H

Description
Manufacturer's Recommended Multiword DMA Transfer Cycle Time
15-0(=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
Minimum PIO Transfer Cycle Time Without Flow Control
15-0(=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
Minimum PIO Transfer Cycle Time With IORDY Flow Control
15- 0(=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
Reserved
Queue depth
15-5(=0) Reserved
4-0(=1F) Maximum queued depth - 1
SATA capabilities
15-13(=0) Reserved
12(=1) High Priority command (Please see 6.5 First-party DMA commands)
11(=0) Reserved
10(=1) Phy event counters
9(=1) Receipt of host-initiated interface power management requests
8(=1) Native Command Queuing supported
7-4(=0) Reserved
3(=x) SATA Gen-3 speed (6.0Gbps) supported
2(=x) SATA Gen-2 speed (3.0Gbps) supported
1(=1) SATA Gen-1 speed (1.5Gbps) supported
0(=0) Reserved
15-4(=0) Reserved
3-1(=xxx) Current negotiated SATA speed
Gen-3 speed of 6.0Gbps
011
Gen-2 speed of 3.0Gbps
010
Gen1 speed of 1.5Gbps
001
0(=0) Reserved
SATA supported features
15-7(=0) Reserved
6(=1) Software setting preservation
5(=0) Reserved
4(=1) In-order data delivery
3(=1) Device initiated interface power management
2(=1) DMA Setup Auto-Activate optimization
1(=1) Non-zero buffer offset in DMA Setup FIS
0(=0) Reserved
SATA enabled features
15-7(=0) Reserved
6(=1) Software setting preservation
5(=0) Reserved
4(=0) In-order data delivery
3(=0) Device initiated interface power management
2(=0) DMA Setup Auto-Activate optimization
1(=0) Non-zero buffer offset in DMA Setup FIS
0(=0) Reserved

Table 84 Identify device information --Continued—

Hitachi hard disk drive specifications
125

Word
80

Content
01FCH

0029H

346BH

Description
Major version number
ATA-2, ATA-3, ATA/ATAPI-4, ATA/ATAPI-5, ATA/ATAPI-6. ATA/ATAPI-7
15-0(=1FCh)
and ATA8-ACS
Minor version number
15-0(=29h)
ATA8-ACS Revision 4
Command
set supported
15 (=0) Reserved
14 (=0) NOP command
13 (=1) READ BUFFER command
12 (=1) WRITE BUFFER command
11 (=0) Reserved
10 (=1) Host Protected Area Feature Set
9 (=0) DEVICE RESET command
8 (=0) SERVICE interrupt
7 (=0) Release interrupt
6 (=1) LOOK AHEAD
5 (=1) WRITE CACHE
4 (=0) PACKET Command feature set
3 (=1) Power management feature set
2 (=0) Removable feature set
1 (=1) Security feature set
0 (=1) SMART feature Set

Table 85 Identify device information --Continued—

Hitachi hard disk drive specifications
126

Word
83

Content
7D69H

4163H
or
4773H

xxxxH

Description
Command set supported
15-14(=01) Word 83 is valid
13 (=1) FLUSH CACHE EXT command supported
12 (=1) FLUSH CACHE command supported
11 (=1) Device Configuration Overlay command supported
10 (=1) 48-bit Address feature set supported
9 (=0) Reserved
8 (=1) SET Max Security extension
7 (=0) Set Features Address Offset feature mode
SET FEATURES subcommand required to spin-up
6 (=1)
after power-up
5 (=1) Power-Up In Standby feature set supported
4 (=0) Removable Media Status Notification feature
3 (=1) Advanced Power Management feature set
2 (=0) CFA feature set
1 (=0) READ/WRITE DMA QUEUED
0 (=1) DOWNLOAD MICROCODE command
Command set/feature supported extension
15-14(=01) Word 84 is valid
13(=0) IDLE IMMEDIATE with UNLOAD FEATURE supported
12-11(= 0) Reserved
10 (=x) URG bit supported for WRITE STREAM DMA and WRITE STREAM PIO
9 (=x) URG bit supported for READ STREAM DMA and READ STREAM PIO
8 (=1) World wide name supported
7 (=0) WRITE DMA QUEUED FUA EXT command supported
WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands
6 (=1)
supported
5 (=1) General Purpose Logging feature set supported
4 (=x) Streaming feature set supported
3 (=0) Media Card Pass Through Command feature set supported
2 (=0) Media serial number supported
1 (=1) SMART self-test supported
0 (=1) SMART error logging supported
Command set/feature enabled
15 Reserved
14 NOP command
13 READ BUFFER command
12 WRITE BUFFER command
11 Reserved
10 Host Protected Area feature set
9 DEVICE RESET command
8 SERVICE interrupt
7 RELEASE interrupt
6 LOOK AHEAD
5 WRITE CACHE
4 PACKET Command feature set
3 Power management feature set
2 Removable media feature set
1 Security feature set
0 SMART feature set

Table 86 Identify device information --Continued—

Hitachi hard disk drive specifications
127

Word
86

Content
xxxxH

Description
Command set/feature enabled
15 Words 120:119 are valid.
14 Reserved
13 FLUSH CACHE EXT command supported
12
11
10

4163H
or
4763H
or
4773H

FLUSH CACHE command supported
Device Configuration Overlay command enabled
48-bit Address features set supported

9
8
7
6

Reserved
Set Max Security extensions enabled
Set Features Address Offset mode

Power-Up In Standby feature set enabled

4
3
2

Removable Media Status Notification feature
Advanced Power Management Feature set
CFA Feature set

Set Features subcommand required to spin-up
after power-up

1 READ/WRITE DMA QUEUED
0 DOWNLOAD MICROCODE command
Command set/feature default
15-14(=01)
13(=0)
12-11(= 0)
10 (=x)

Word 87 is valid
IDLE IMMEDIATE with UNLOAD FEATURE supported
Reserved
URG bit supported for WRITE STREAM DMA and WRITE STREAM PIO

9 (=x)

URG bit supported for READ STREAM DMA and READ STREAM PIO

8 (=1)
7 (=0)

World wide name supported
WRITE DMA QUEUED FUA EXT command supported

6 (=1)
5 (=1)
4 (=x)

WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands
supported
General Purpose Logging feature set supported
Valid CONFIGURE STREAM command has been executed

3 (=0)
2 (=0)

Media Card Pass Through Command feature set enabled
Media serial number is valid

1 (=1)

SMART self-test supported

0 (=1)

SMART error logging supported

Table 87 Identify device information --Continued—

Hitachi hard disk drive specifications
128

Word
88

Content
0x7FH

xxxxH

90
91
92
93

0000H
0000H
FFFEH
0000H

Description
Ultra DMA Transfer modes
15- 8(=xx) Current active Ultra DMA transfer mode
15 Reserved (=0)
14 Mode 6
1 = Active
13 Mode 5
1 = Active
12 Mode 4
1 = Active
11 Mode 3
1 = Active
10 Mode 2
1 = Active
9 Mode 1
1 = Active
8 Mode 0
1 = Active
7- 0(=7F) Ultra DMA transfer mode supported
7 Reserved (=0)
6 Mode 6
1 = Support
5 Mode 5
1 = Support
4 Mode 4
1 = Support
3 Mode 3
1 = Support
2 Mode 2
1 = Support
1 Mode 1
1 = Support
0 Mode 0
1 = Support
Time required for security erase unit completion
Time= value(xxxxh)*2 [minutes]
Time required for Enhanced security erase completion
Current Advanced power management value
Current Password Revision Code
COMRESET result

Table 88 Identify device information --Continued—

Hitachi hard disk drive specifications
129

0 = Not Active
0 = Not Active
0 = Not Active
0 = Not Active
0 = Not Active
0 = Not Active
0 = Not Active

Word
94

Content
0000H

xxxxH

98-99

xxxxH

100-103

xxxxH

104

xxxxH

105-106
107

0000H
5A87H

108-111

xxxxH

112-118
119

0000H
4014h

120

4014h

121-126
127

0000H
0000H

Description
Reserved
Stream Minimum Request Size
Number of sectors that provides optimum performance in streaming environment. This number
shall be a power of two, with a minimum of eight sectors (4096 bytes). The starting LBA value for
each streaming command should be evenly divisible by this request size.
Streaming Transfer Time - DMA
The worst-case sustainable transfer time per sector for the device is calculated as follows:
Streaming Transfer Time = (word 96) * (words(99:98) / 65536)
If the Streaming Feature set is not supported by the device, the content of word 96 shall be zero.
Streaming Access Latency - DMA and PIO
The worst-case access latency of the devoce for a streaming command is calculated as follows:
Access Latency = (word 97) * (words(99:98) / 256)
If the Streaming Feature set is not supported by the device, the content of word 97 shall be zero.
Streaming Performance Granularity
These words define the fixed unit of time that is used in Identify Device words (97:96) and
(104),and Set Features subcommand 43h, and in the Streaming Performance Parameters log,
which is accessed by use of the Read Log Ext command, and in the Command Completion
Time Limit that is passed in streaming commands. The unit of time for this parameter shall be in
microseconds, e.g. ad value of 10000 indicates 10 ms.
Total Number of User Addressable Logical Sectors for 48-bit commands
Streaming Transfer Time - PIO
The worst-case sustainable transfer time per sector for the device is calculated as follows:
Streaming Transfer Time = (word 104) * (words(99:98) / 65536)
If the Streaming Feature set is not supported by the device, the content of word 104 shall be
zero.
Reserved
Inter-seek delay for ISO-7779 acoustic testing in microseconds
World wide name
the optional value of the world wide name for the device
Reserved
Supported settings (Continued from word 84:82)
15
Shall be cleared to zero
14
Shall be set to one.
13-6
Reserved
5
0=Free-fall Control feature set is not supported
4
1=The segmented feature for download microcode is supported.
3
0=Read and Write DMA Ext GPL optional commands are not supported.
2
1=Write Uncorrectable is supported.
1
0=Write-Read-Verify feature set is not supported
0
Reserved
Command set/feature enabled/supported. (Continued from word 87:85)
15
Shall be cleared to zero
14
Shall be set to one.
13-6
Reserved
5
0=Free-fall Control feature set is disabled
4
1=The segmented feature for download microcode is supported.
3
0=Read and Write DMA Ext GPL optional commands are not supported.
2
1=Write Uncorrectable is supported.
1
0=Write-Read-Verify feature set is not enabled
0
Reserved
Reserved
Removable Media Status Notification feature set
0000H=Not supported

Table 89 Identify device information --Continued—

Hitachi hard disk drive specifications
130

Word
128

Content
xxxxH

129

xxxxH

130-159
160-167
168

xxxxH
0000H
0002H

169-175
176-205
206

0000H
0000H

Description
Security status. Bit assignments
15-9 Reserved
8 Security Level
1= Maximum, 0= High
7-6 Reserved
5 Enhanced erase
1= Support
4 Expired
1= Expired
3 Freeze
1= Frozen
2 Lock
1= Locked
1 Enabled/Disable
1= Enable
0 Capability
1= Support
Current Set Feature Option. Bit assignments
15-4 Reserved
3 Auto reassign enabled
1= Enable
2 Reverting enabled
1= Enable
1 Read Look-ahead enabled
1= Enable
0 Write Cache enabled
1= Enable
Reserved
Reserved
15-4 Reserved
3-0 Device nominal form factor
2=3.5”
Reserved
Current media serial number (0000H=Not supported)
SCT Command set support
15-12 Vendor specific
11-6 Reserved
5 Action Code 5 (SCT Data Table)
1= Support
4 Action Code 4 (Features Control) 1= Support
Action Code 3
3
1= Support
(Error Recovery Control)
Action Code 2
2
1= Support
(SCT Write Same)
Action Code 1
1
0= Not Support
(Long Sector Access)
SCT Feature Set
0
1= Support
(includes SCT status)

Table 90 Identify device information --Continued—

Note.

The '*' mark in 'Content' field indicates the use of those parameters are vendor specific.

Hitachi hard disk drive specifications
131

Word

Content

207-208
209

0000H
0000H

210-211

0000H

212-213

0000H

214

0000H

215-216

218
219

0000H
1C20H
or
1644H
0000H
0000H

220

0000H

221
222

0000H
101FH

223
224-233

0021H
0000H

234

0001H

235

03E0H

236-254

0000H

255

xxA5H

217

Description
Reserved
Alignment of logical blocks within a larger physical block
0000H=Not supported
Write-Read-Verify Sector Count Mode 3 (DWord)
0000H=Not supported
Write-Read-Verify Sector Count Mode 2 (DWord)
0000H=Not supported
NV Cache Capabilities
0000H=Not supported
NV Cache Size in Logical Blocks (DWord)
Nominal media rotation rate
Reserved
NV Cache Options
0000H=Not supported
15-8(=0) Reserved
7-0(=0) Write-Read-Verify feature set current mode(not supported)
Reserved
Transport major version number
15-12(=1) Transport Type (1= Serial)
11-5(=0) Reserved
4(=1) SATA Rev 2.6
3(=1) SATA Rev 2.5
2(=1) SATA II: Extensions
1(=1) SATA 1.0a
0(=1) ATA8-AST
Transport minor version number (ATA8-AST T13 Project D1697 Revision 0b)
Reserved
Minimum number of 512-byte data blocks per DOWNLOAD MICROCODE command
for mode 3
Maximum number of 512-byte data blocks per DOWNLOAD MICROCODE command
for mode 3
Reserved
Checksum. This value is the two's complement of the sum of all bytes in byte 0
15-8
through 510
7-0 (A5) Signature

Table 91 Identify device information --Continued—

Hitachi hard disk drive specifications
132

11.11 Idle (E3h/97h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
V

0
ERR
V

Table 92 Idle Command (E3h/97h)
The Idle command causes the device to enter Idle mode immediately, and set auto power down timeout
parameter (standby timer). And then the timer starts counting down.
When the Idle mode is entered, the device is spun up to operating speed. If the device is already spinning, the
spin up sequence is not executed.
During Idle mode the device is spinning and ready to respond to host commands immediately.

Hitachi hard disk drive specifications
133

Output Parameters To The Device
Sector Count

Timeout Parameter. If zero, then the automatic power down sequence is disabled. If
non-zero, then the automatic power down sequence is enabled, and the timeout interval is
shown below:
Value
---------0
1-240
241-251
252
253
254
255

Timeout
------------------------Timer disabled
Value * 5
(Value-240) * 30 minutes
21 minutes
8 hours
21 minutes 10 seconds
21 minutes 15 seconds

When the automatic power down sequence is enabled, the drive will enter Standby mode
automatically if the timeout interval expires with no drive access from the host. The timeout
interval will be reinitialized if there is a drive access before the timeout interval expires.

Hitachi hard disk drive specifications
134

11.12 Idle Immediate (E1h/95h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
V

0
ERR
V

Table 93 Idle Immediate Command (E1h/95h)
The Idle Immediate command causes the device to enter Idle mode.
The device is spun up to operating speed. If the device is already spinning, the spin up sequence is not
executed.
During Idle mode the device is spinning and ready to respond to host commands immediately.
The Idle Immediate command will not affect to auto power down timeout parameter.

Hitachi hard disk drive specifications
135

11.13 Initialize Device Parameters (91h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N
V

AMN

BSY

RDY

DSC DRQ COR IDX
-

0
ERR
V

Table 94 Initialize Device Parameters Command (91h)
The Initialize Device Parameters command enables the host to set the number of sectors per track and the
number of heads minus 1, per cylinder. Words 54-58 in Identify Device Information reflect these parameters.
The parameters remain in effect until following events:
Another Initialize Device Parameters command is received.
The device is powered off.
Soft reset occurs and the Set Feature option of CCh is set instead of 66h.
Output Parameters To The Device
Sector Count

The number of sectors per track. 0 does not mean there are 256 sectors per track, but
there is no sector per track.

The number of heads minus 1 per cylinder. The minimum is 0 and the maximum is 15.

Note: The following conditions needs to be satisfied to avoid invalid number of cylinders beyond FFFFh.
(Total number of user addressable sectors)/((Sector Count)*(H+1)) = < FFFFh
The total number of user addressable sectors is described in Identify Device command.

Hitachi hard disk drive specifications
136

11.14 Read Buffer (E4h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 95 Read Buffer Command (E4h)
The Read Buffer command transfers a sector of data from the sector buffer of device to the host.
The sector is transferred through the Data Register 16 bits at a time.
The sector transferred will be from the same part of the buffer written to by the last Write Buffer command. The
contents of the sector may be different if any reads or writes have occurred since the Write Buffer command was
issued.

Hitachi hard disk drive specifications
137

11.15 Read DMA(C8h/C9h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
V

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF

DSC DRQ COR IDX
V

0
ERR
V

Table 96 Read DMA Command (C8h/C9h)
The Read DMA command reads one or more sectors of data from disk media, then transfers the data from the
device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. The data transfers are qualified by
DMARQ and are performed by the slave-DMA channel. The device issues only one interrupt per command to
indicate that data transfer has terminated and status is available.
If an uncorrectable error occurs, the read will be terminated at the failing sector.

Hitachi hard disk drive specifications
138

Output Parameters To The Device
Sector Count

The number of continuous sectors to be transferred. If zero is specified, then 256
sectors will be transferred.

Sector Number

The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register specifies LBA address bits 0-7 to be transferred. (L=1)

Cylinder High/Low

The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register specifies LBA address bits 8-15 (Low) 16-23 (High) to be
transferred. (L=1)

The head number of the first sector to be transferred. (L=0)
In LBA mode, this register specifies LBA bits 24-27 to be transferred. (L=1)

R
The retry bit, but this bit is ignored.
Input Parameters From The Device
Sector Count
The number of requested sectors not transferred. This will be zero, unless an
unrecoverable error occurs.
Sector Number
The sector number of the last transferred sector. (L=0)
Cylinder High/Low

In LBA mode, this register contains current LBA bits 0-7. (L=1)
The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8-15 (Low), 16-23 (High). (L=1)

The head number of the sector to be transferred. (L=0)
In LBA mode, this register contains current LBA bits 24-27. (L=1)

Hitachi hard disk drive specifications
139

11.16 Read DMA Ext (25h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Device/Head

Command

Status

Feature

Sector Count
Sector
Number

Cylinder Low

Cylinder High

...See Below...

Sector Count
Sector
Number

Cylinder Low

Cylinder High

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC DRQ COR
V

IDX

ERR

Table 97 Read DMA Ext Command (25h)
The Read DMA command reads one or more sectors of data from disk media, and then transfers the data from
the device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. The data transfers are qualified by
DMARQ and are performed by the slave-DMA channel. The device issues only one interrupt per command to
indicate that data transfer has terminated and status is available.
If an uncorrectable error occurs, the read will be terminated at the failing sector.

Hitachi hard disk drive specifications
140

Output Parameters To The Device
Sector Count Current
The number of sectors to be transferred low order, bits (7:0).
Sector Count Previous
The number of sectors to be transferred high order, bits (15:8). If 0000h in the
Sector Count register is specified, then 65,536 sectors will be transferred.
Sector Number Current

LBA (7:0)

Sector Number Previous

LBA (31:24)

Cylinder Low Current

LBA (15:8)

Cylinder Low Previous

LBA (39:32)

Cylinder High Current

LBA (23:16)

Cylinder High Previous

LBA (47:40)

Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)

LBA (31:24)of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8)of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32)of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16)of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40)of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
141

11.17 Read FPDMA Queued (60h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Device/Head

Command

Status

Feature

Sector Count
Sector
Number

Cylinder Low

Cylinder High

...See Below...

Sector Count
Sector
Number

Cylinder Low

Cylinder High

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC DRQ COR
V

IDX

ERR

Table 98 Read FPDMA Queued Command (60h)
The Read FPDMA command reads one or more sectors of data from disk media, and then transfers the data
from the device to the host.
If an uncorrectable error occurs, the read will be terminated at the failing sector.

Hitachi hard disk drive specifications
142

Output Parameters To The Device
Feature Current
The number of sectors to be transferred low order, bits (7:0).
Feature Previous
The number of sectors to be transferred high order, bits (15:8).
Sector Count Current
.
TAG (bits 7-3)
The TAG value shall be assigned to be different from all other queued
commands. The value shall not exceed the maximum queue depth specified by
the Word 75 of the Identify Device information.
Sector Count Previous
PRIO (bits 7)
The Priority (PRIO) value shall be assigned by the host based on the priority of
the command issued. The device shall make a best effort to complete High
priority requests in a more timely fashion than Normal priority requests. The
Priority values are defined as follows:
0b
Normal priority
1b
High priority
Sector Number Current
LBA (7:0)
Sector Number Previous

LBA (31:24)

Cylinder Low Current

LBA (15:8)

Cylinder Low Previous

LBA (39:32)

Cylinder High Current

LBA (23:16)

Cylinder High Previous

LBA (47:40)

Device/Head
FUA (bit 7)

When the FUA bit is set to 1, the requested data is always retrieved from the
media regardless of whether the data are held in the sector buffer or not.
When the FUA bit is set to 0, the data may be retrieved from the media or from
the cached data left by previously processed Read or Write commands.

Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)

LBA (31:24)of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8)of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32)of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16)of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40)of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
143

11.18 Read Log Ext (2Fh)
Command Block Output Registers

Command Block Input Registers

7 6 5 4 3 2 1 0

Data Low

Data High

Current

Error

Current

...See Below...

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 99 Read Log Ext Command (2Fh)
This command returns the specified log to the host. The device shall interrupt for each DRQ block transferred.

Hitachi hard disk drive specifications
144

Output Parameters To The Device
Feature
Log Address Specific
Sector Count Current
The number of sectors to be read from the specified log low order, bits (7:0).
The log transferred by the drive shall start at the sector in the specified log at the
specified offset, regardless of the sector count requested.
Sector Count Previous
Sector Number Current

The number of sectors to be read from the specified log high orders, bits (15:8).
The log to be returned as described in 0.

Cylinder Low Current

The first sector of the log to be read low order, bits (7:0).

Cylinder Low Previous

The first sector of the log to be read high order, bits (15:8).

Log address

Content

Feature set

Type

00h

Log directory

N/A

Read Only

03h

Extended Comprehensive SMART error log

SMART error logging

Read Only

06h

SMART self-test log

SMART self-test

See Note

07h

Extended SMART self-test log

SMART self-test

Read Only

10h

Command Error

Native Command Queuing

Read Only

11h

Phy Event Counters

Serial ATA

Read Only

20h

Streaming Performance log

Streaming

Read Only

21h

Write Stream Error log

Streaming

Read Only

22h

Read Stream Error log

Streaming

Read Only

80h-9Fh
Host vendor specific
SMART
Read/Write
Note: If log address 06h is accessed using the Read Log Ext or Write Log Ext commands, command abort shall be
returned.
Note: Please see 9.17.3 about Phy Event Counter.

Table 100 Log Address Definition

The Extended SMART self-test log sector shall support 48-bit and 28-bit addressing. All 28-bit entries contained
in the SMART self-test log sector shall also be included in the Comprehensive SMART self-test log sector with
the 48-bit entries.
If the feature set associated with the log specified in the Sector Number register is not supported or enabled, or if
the values in the Sector Count, Sector Number or Cylinder Low registers are invalid, the device shall return
command aborted.

Hitachi hard disk drive specifications
145

11.18.1 General Purpose Log Directory
Table 101 defines the 512 bytes that make up the General Purpose Log Directory.
Description

Bytes

Offset

General Purpose Logging Version

00h

Number of sectors in the log at log address 01h (7:0)

02h

Number of sectors in the log at log address 01h (15:8)

03h

Number of sectors in the log at log address 02h (7:0)

04h

Number of sectors in the log at log address 02h (15:8)

05h

Number of sectors in the log at log address 20h (7:0)

40h

Number of sectors in the log at log address 20h (15:8)

41h

Number of sectors in the log at log address 21h (7:0)

42h

Number of sectors in the log at log address 21h (15:8)

43h

Number of sectors in the log at log address 22h (7:0)

44h

Number of sectors in the log at log address 22h (15:8)

45h

Number of sectors in the log at log address 80h (7:0)

100h

Number of sectors in the log at log address 80h (15:8)

101h

Number of sectors in the log at log address FFh (7:0)

1FEh

Number of sectors in the log at log address FFh (15:8)

1FFh

...

512

Table 101 General Purpose Log Directory
The value of the General Purpose Logging Version word shall be 0001h. A value of 0000h indicates that there is
no General Purpose Log Directory.
The logs at log addresses 80-9Fh shall each be defined as 16 sectors long.

Hitachi hard disk drive specifications
146

11.18.2 Extended Comprehensive SMART Error log
Table 102 defines the format of each of the sectors that comprise the Extended Comprehensive SMART error
log. Error log data structure shall not include errors attributed to the receipt of faulty commands such as
command codes not implemented by the device or requests with invalid parameters or in valid addresses.
Description

Bytes

Offset

SMART error log version

00h

Reserved

01h

Error log index (7:0)

02h

Error log index (15:8)

03h

1st error log data structure

124

04h

2nd error log data structure

124

80h

3rd error log data structure

124

FCh

4th error log data structure

124

178h

Device error count

1F4h

Reserved

1F6h

Data structure checksum

1FFh

512

Table 102 Extended Comprehensive SMART Error Log

11.18.2.1 Error log version
The value of this version shall be 01h.

11.18.2.2 Error log index
This indicates the error log data structure representing the most recent error. If there have been no error log
entries, it is cleared to 0. Valid values for the error log index are 0 to 4.

11.18.2.3 Extended Error log data structure
An error log data structure shall be presented for each of the last four errors reported by the device.
These error log data structure entries are viewed as a circular buffer. The fifth error shall create an error log
structure that replaces the first error log data structure. The next error after that shall create an error log data
structure that replaces the second error log structure, etc.
Unused error log data structures shall be filled with zeros.
Data format of each error log structure is shown below.

Hitachi hard disk drive specifications
147

Description

Bytes

Offset

1st command data structure

00h

2nd command data structure

12h

3rd command data structure

24h

4th command data structure

36h

5th command data structure

48h

Error data structure

5Ah

124

Table 103 Extended Error log data structure

Command data structure: Data format of each command data structure is shown below.
Description

Bytes

Offset

Device Control register

00h

Features register (7:0) (see Note)

01h

Features register (15:8)

02h

Sector count register (7:0)

03h

Sector count register (15:8)

04h

Sector number register (7:0)

05h

Sector number register (15:8)

06h

Cylinder Low register (7:0)

07h

Cylinder Low register (15:8)

08h

Cylinder High register (7:0)

09h

Cylinder High register (15:8)

0Ah

Device/Head register

0Bh

Command register

0Ch

Reserved

0Dh

Timestamp (milliseconds from Power-on)

0Eh

18
Note: bits (7:0) refer to the most recently written contents of the register. Bits (15:8) refer to the
contents of the register prior to the most recent write to the register.

Table 104 Command data structure

Hitachi hard disk drive specifications
148

Error data structure: Data format of error data structure is shown below.
Description

Bytes

Offset

Reserved

00h

Error register

01h

Sector count register (7:0) (see Note)

02h

Sector count register (15:8) (see Note)

03h

Sector number register (7:0)

04h

Sector number register (15:8)

05h

Cylinder Low register (7:0)

06h

Cylinder Low register (15:8)

07h

Cylinder High register (7:0)

08h

Cylinder High register (15:8)

09h

Device/Head register

0Ah

Status register

0Bh

0Ch

State

1Fh

Life timestamp (hours)

20h

Extended error data (vendor specific)

34
Note: bits (7:0) refer to the contents if the register is read with bit 7 of the Device Control register
cleared to zero. Bits (15:8) refer to the contents if the register is read with bit 7 of the Device
Control register set to one.

Table 105 Error data structure
State shall contain a value indicating the state of the device when the command was issued to the device or the
reset occurred as described below.
Value

State

x0h

Unknown

x1h

Sleep

x2h

Standby

x3h

Active/Idle

x4h

SMART Off-line or Self-test

x5h-xAh

Reserved

xBh-xFh

Vendor specific
Note: The value of x is vendor specific.

Hitachi hard disk drive specifications
149

11.18.2.4 Device error count
This field shall contain the total number of errors attributable to the device that have been reported by the device
during the life of the device. This count shall not include errors attributed to the receipt of faulty commands such
as commands codes not implemented by the device or requests with invalid parameters or invalid addresses. If
the maximum value for this field is reached the count shall remain at the maximum value when additional errors
are encountered and logged.

11.18.3 Extended Self-test log sector
Table 106 defines the format of each of the sectors that comprise the Extended SMART self-test log.
The Extended SMART self-test log sector shall support 48-bit and 28-bit addressing. All 28-bit entries contained
in the SMART self-test log, defined in 7.42.6, “Self-test log data structure" on page 219 shall also be included in
the Extended SMART self-test log with all 48-bit entries.
Description

Bytes

Offset

Self-test log data structure revision number

00h

Reserved

01h

Self-test descriptor index (7:0)

02h

Self-test descriptor index (15:8)

03h

Descriptor entry 1

04h

Descriptor entry 2

1Eh

1D8h

1F2h

1F4h

1FFh

...
Descriptor entry 18
Vendor specific
Reserved
Data structure checksum

512

Table 106 Extended Self-test log data structure
These descriptor entries are viewed as a circular buffer. The nineteenth self-test shall create a descriptor entry
that replaces descriptor entry 1. The next self-test after that shall create a descriptor entry that replaces
descriptor entry 2, etc. All unused self-test descriptors shall be filled with zeros.

11.18.3.1 Self-test log data structure revision number
The value of this revision number shall be 01h.

11.18.3.2 Self-test descriptor index
This indicates the most recent self-test descriptor. If there have been no self-tests, this is set to zero. Valid
values for the Self-test descriptor index are 0 to 18.

Hitachi hard disk drive specifications
150

11.18.3.3 Extended Self-test log descriptor entry
The content of the self-test descriptor entry is shown below.
Description

Bytes

Offset

Self-test number

00h

Self-test execution status

01h

Power-on life timestamp in hours

02h

Self-test failure check point

04h

Failing LBA (7:0)

05h

Failing LBA (15:8)

06h

Failing LBA (23:16)

07h

Failing LBA (31:24)

08h

Failing LBA (39:32)

09h

Failing LBA (47:40)

0Ah

0Bh

Vendor specific

Table 107 Extended Self-test log descriptor entry

Hitachi hard disk drive specifications
151

11.18.4 Command Error
Table 108 defines the format of the Command Error data structure.
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14 - 255
256 – 510
511

7
NQ

Reserved

TAG
Reserved
Status
Error
Sector Number
Cylinder Low
Cylinder High
Dev/Head
Sector Number Previous
Cylinder Low Previous
Cylinder High Previous
Reserved
Sector Count
Sector Count Previous
Reserved
Vendor Unique
Data Structure Checksum

Table 108 Command Error information
The TAG field (Byte 0 Bits 4-0) contains the tag number corresponding to a queued command if the NQ bit is
cleared.
The NQ field (Byte 0 Bit 7) indicates whether the error condition was a result of a non-queued or not. If it is
cleared the error information corresponds to a queued command specified by the tag number indicated in the
TAG field.
The bytes 1 to 13 correspond to the contents of Shadow Register Block when the error was reported.
The Data Structure Checksum (Byte 511) contains the 2‟s complement of the sum of the first 511 bytes in the
data structure. The sum of all 512 bytes of the data structure will be zero when the checksum is correct.

Hitachi hard disk drive specifications
152

11.18.5 Read Stream Error log
Table 109 defines the format of the Read Stream Error log. Entries are placed into the Read Stream Error log
only when the SE bit is set to one in the Status Register. The 512 bytes returned shall contain a maximum of
31 error entries. The Read Stream Error Count shall contain the total number of Read Stream Errors detected
since the last successful completion of the Read Log Ext command with LBA Low register set to 22h. This
error count may be greater than 31, but only the most recent 31 errors are represented by entries in the log. If
the Read Stream Error Count reaches the maximum value that can be represented after the next error is
detected the Read Stream Error Count shall remain at the maximum value. After successful completion of a
Read Log Ext command with the LBA Low Register set to 22h, the Read Stream Error Log shall be reset to a
power-on or hardware reset condition, with the Error Log Index and Read Stream Error Count cleared to zero.
The Read Stream Error Log is not preserved across power cycles and hardware reset.
Description

Bytes

Offset

Structure Version

00h

Error Log Index

01h

Read Stream Error Log Count

02h

Reserved

04h

Read Stream Error Log Entry #1

10h

Read Stream Error Log Entry #2

20h

1F0h

...
Read Stream Error Log Entry #31

512

Table 109 Read Stream Error Log
The Data Structure Version field shall contain a value of 02h indicating the second revision of the structure
format.
The Read Stream Error Log Count field shall contain the number of uncorrected sector entries currently
reportable to the host. This value may exceed 31.
The Error Log Index indicates the error log data structure representing the most recent error.
(31:1) are valid.

Hitachi hard disk drive specifications
153

Only values

Table 109 defines the format of each entry in the Read Stream Error Log.
Description

Bytes

Offset

Feature Register Contents Value (current)

00h

Feature Register Contents Value (previous)

01h

Status

02h

Error

03h

LBA (7:0)

04h

LBA (15:8)

05h

LBA (23:16)

06h

LBA (31:24)

07h

LBA (39:32)

08h

LBA (47:40)

09h

Reserved

0A-0Bh

Sector Count (LSB)

0Ch

Sector Count (MSB)

0Dh

Reserved

0E-0Fh

Table 110 Stream Error Log entry

Byte (1:0) contains the contents of the Feature Register when the error occurred. This Value shall be set to
0FFFFh for s deferred write error.
Byte 2 contains the contents of the Status Register when the error occurred.
Byte 3 contains the contents of the Error Register when the error occurred.
Byte (9:4) indicates the starting LBA of the error.
Byte (13:12) indicate the length of the error. Therefore, each entry may describe a range of sectors at the
given address and spanning the specified number of sectors.

Hitachi hard disk drive specifications
154

11.18.6 Write Stream Error log
Table 111 defines the format of the Write Stream Error log. Entries are placed into the Write Stream Error log
only when the SE bit is set to one in the Status Register. The 512 bytes returned shall contain a maximum of
31 error entries. The Write Stream Error Count shall contain the total number of Write Stream Errors detected
since the last successful completion of the Read Log Ext command with LBA Low register set to 21h. This error
count may be greater than 31, but only the most 31 errors are represented by entries in the log. If the Write
Stream Error Count reaches the maximum value that can be represented after the next error is detected the
Write Stream Error Count shall remain at the maximum value. After successful completion of a Read Log Ext
command with the LBA Low Register set to 21h, the Write Stream Error Log shall be reset to a power-on or
hardware reset condition, with the Error Log Index and Write Stream Error Count cleared to zero. The Write
Stream Error Log is not reserved across power cycles and hardware reset.
Description

Bytes

Offset

Structure Version

00h

Error Log Index

01h

Write Stream Error Log Count

02h

Reserved

04h

Write Stream Error Log Entry #1

10h

Write Stream Error Log Entry #2

20h

1F0h

...
Write Stream Error Log Entry #31

512

Table 111 Write Stream Error Log

The Data Structure Version field shall contain a value of 02h indicating the second revision of the structure
format.
The Write Stream Error Log Count field shall contain the number of Write Stream command entries since the
last power on, since this log was last read, or since hardware reset was executed.
The Error Log Index indicates the error log data structure representing the most recent error.
(31:0) are valid.
Table 109 defines the format of each entry in the Error Log.

Hitachi hard disk drive specifications
155

Only values

11.18.7 Streaming Performance log
Table 112 defines the format of the log returned by the Read Log Ext command, when the LBA Low register is
20h. This data set is referred to as the Streaming Performance Parameters log, the length of which (in sectors)
is statically indicated in Read Log Ext log address 00h (Log Directory).
The host should base its calculations on the larger of its Typical Host Interface Sector Time and the device
reported Sector Time values, and on the sum of the device reported Access Time values and any additional
latency that only the host is aware of (e.g. host command overhead, etc.).
Description

Bytes

Stream Performance Parameters log version

K, Number of Regions in Sector Time Array

L, Number of Positions in Position Array

M, Number of Position-differences in Access Time Array

Sector Time Array

K*8

Position Array

L*8

Access Time Array

M*4

Reserved

Table 112 Streaming Performance Parameters log

Description

Bytes

LBA of reference location (LBA(7:0)...LBA(47:40))

n-(n+5)

(Identify Device words (99:98))/65536 time units per sector at the reference location

(n+6)-(n+7)

Table 113 Sector Time Array Entry (Linearly Interpolated)

Description

Bytes

LBA of start of region (LBA(7:0)...LBA(47:40))
Position number in the range 0...32767

n-(n+5)
(n+6)-(n+7)

Table 114 Position Array Entry (Linearly Interpolated)

Description

Bytes

Difference in position from last stream access to new stream access
Time that may be required to begin access at new stream access position, in
(Identify Device words (99:98))/256 time units

Table 115 Access Time Array Entry (Linearly Interpolated)

Hitachi hard disk drive specifications
156

n-(n+1)
(n+2)-(n+3)

11.19 Read Multiple (C4h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 116 Read Multiple Command (C4h)
The Read Multiple command reads one or more sectors of data from disk media, and then transfers the data
from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time. Command execution is identical to the
Read Sector(s) command except that an interrupt is generated for each block (as defined by the Set Multiple
command) instead of for each sector.

Hitachi hard disk drive specifications
157

11.20 Read Multiple Ext (29h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Device/Head

Command

Status

Feature

Sector Count
Sector
Number
Cylinder Low

Cylinder High

…See Below…

Sector Count
Sector
Number
Cylinder Low

Cylinder High

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 117 Read Multiple Ext Command (29h)
The Read Multiple Ext command reads one or more sectors of data from disk media, and then transfers the data
from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time. Command execution is identical to the
Read Sector(s) command except that an interrupt is generated for each block (as defined by the Set Multiple
command) instead of for each sector.

Hitachi hard disk drive specifications
158

Output Parameters To The Device
Sector Count Current
Sector Count Previous

The number of continuous sectors to be transferred low order, bits (7:0).
The number of continuous sectors to be transferred high order, bits (15:8). If
0000h is specified in the Sector Count register, then 65,536 sectors will be
transferred.

Sector Number Current

LBA (7:0).

Sector Number Previous

LBA (31:24).

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
159

11.21 Read Native Max Address (F8h)
Block Output Registers Command

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 118 Read Native Max ADDRESS (F8h)
This command returns the native max LBA/CYL of HDD which is not affected by Set Max Address command.
The 48-bit native max address is greater than 268,435,455; the Read Native Max Address command shall return
a value of 268,435,455.
Input Parameters From The Device
Sector Number
In LBA mode, this register contains native max LBA bits 0-7. (L=1)
In CHS mode, this register contains native max sector number. (L=0)
Cylinder High/Low
In LBA mode, this register contains native max LBA bits 8-15 (Low), 16-23 (High).
(L=1)
In CHS mode, this register contains native max cylinder number. (L=0)
H
In LBA mode, this register contains native max LBA bits 24-27. (L=1)
In CHS mode, this register contains native max head number.(L=0)

Hitachi hard disk drive specifications
160

11.22 Read Native Max Address Ext (27h)
Command Block Output Registers

Command Block Input Registers

7 6 5 4 3 2 1 0

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

1 1 1 D -

Command

0 0 1 0 0 1 1 1

Device/Head

…See Below…

Status

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 119 Read Native Max Address Ext (27h)
This command returns the native max LBA of HDD which is not effected by Set Max Address Ext command.

Hitachi hard disk drive specifications
161

Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the Native max address.

Sector Number (HOB=1)

LBA (31:24) of the address of the Native max address.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the Native max address.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the Native max address.

Cylinder High (HOB=0)

LBA (23:16) of the address of the Native max address.

Cylinder High (HOB=1)

LBA (47:40) of the address of the Native max address.

Hitachi hard disk drive specifications
162

11.23 Read Sector(s) (20h/21h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF

DSC DRQ COR IDX ERR
V

Table 120 Read Sector(s) Command (20h/21h)
The Read Sector(s) command reads one or more sectors of data from disk media, and then transfers the data
from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
If an uncorrectable error occurs, the read will be terminated at the failing sector.

Hitachi hard disk drive specifications
163

Output Parameters To The Device
Sector Count
The number of continuous sectors to be transferred.
sectors will be transferred.

If zero is specified, then 256

Sector Number

The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 – 7. (L=1)

Cylinder High/Low

The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 – 15 (Low), 16 – 23 (High). (L=1)

The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 – 27. (L=1)

The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 – 7. (L=1)

Cylinder High/Low

The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 – 15 (Low), 16 – 23 (High).
(L=1)

The head number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 24 – 27. (L=1)

Hitachi hard disk drive specifications
164

11.24 Read Sector(s) Ext (24h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

Sector
Number

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Cylinder Low

Sector
Number

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 121 Read Sector(s) Ext Command (24h)
The Read Sector(s) Ext command reads from 1 to 65,536 sectors of data from disk media, and then transfers
the data from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
If an uncorrectable error occurs, the read will be terminated at the failing sector.

Hitachi hard disk drive specifications
165

Output Parameters To The Device
Sector Count Current

The number of continuous sectors to be transferred low order, bits (7:0)

Sector Count Previous

The number of continuous sectors to be transferred high order, bits (15:8). If
zero is specified in the Sector Count register, then 65,536 sectors will be
transferred.

Sector Number Current
Sector Number Previous
Cylinder Low Current

LBA (7:0).
LBA (31:24).
LBA (15:8).

Cylinder Low Previous
LBA (39:32).
Cylinder High Current
LBA (23:16).
Cylinder High Previous
LBA (47:40).
Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)
LBA (31:24) of the address of the first unrecoverable error.
Cylinder Low (HOB=0)
Cylinder Low (HOB=1)
Cylinder High (HOB=0)
Cylinder High (HOB=1)

LBA (15:8) of the address of the first unrecoverable error.
LBA (39:32) of the address of the first unrecoverable error.
LBA (23:16) of the address of the first unrecoverable error.
LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
166

11.25 Read Stream DMA (2Ah)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

Sector
Number

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Cylinder Low

Sector
Number

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

CCT
O

BSY

RDY

DWE DRQ
0

COR

IDX

ERR

Table 122 Read Stream DMA Command (2Ah)

The Read Stream DMA command reads one to 65536 sectors as specified in the Sector Count register.
value of 0000h in the Sector Count register requests 65536 sectors.

The RC bit indicates that the drive operate in a continuous read mode for the Read Stream command. When RC
is cleared to zero the drive shall operate in normal Streaming read mode.
When the Read Continuous mode is enabled, the device shall transfer data of the requested length without
setting the ERR bit to one. The SE bit shall be set to one if the data transferred includes errors. The data may
be erroneous in this case.
If the Read Continuous bit is set to one, the device shall not stop execution of the command due to errors. If
the RC bit is set to one and errors occur in reading or transfer of the data, the device shall continue to transfer
the amount of data requested and then provide ending status with the BSY bit cleared to zero, the SE bit set to
one, the ERR bit cleared to zero, and the type of error, ICRC,UNC,IDNF or ABRT, reported in the error log. If
the RC bit is set to one and the Command Completion Time Limit expires, the device shall stop execution of the
command and provide ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to
zero, and report the fact that the Command Completion Time Limit expired by setting the CCTO bit in the error
log to one, In all cases, the device shall attempt to transfer the amount of data requested within the Command

Hitachi hard disk drive specifications
167

Completion Time Limit event if some data transferred is in error.
Output Parameters To The Device
Feature Current
URG (bit7)

URG specifies an urgent transfer request. The Urgent bit specifies that the
command should be completed in the minimum possible time by the device and
shall be completed within the specified Command Completion Time Limit.

RC specifies Read Continuous mode enabled. If the Read Continuous bit is set
to one, the device shall not stop execution of the command due to errors.
If the RC bit is set to one and errors occur in reading or transfer of the data, the
device shall continue to transfer the amount of data requested and then provide
ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit
cleared to zero, and the type of error, ICRC, UNC, IDNF or ABRT reported in the
error log.
If the RC bit is set to one and the CCTL expires, the device shall stop execution
of the command and provide ending status with the BSY bit cleared to zero, the
SE bit set to one, the ERR bit cleared to zero, and report the fact that the CCTL
expired by setting the CCTO bit in the error log to one.
In all cases, the device shall attempt to transfer the amount of data requested
within the CCTL even if some data transferred is in error.

(bit6)

NS (bit5)

NS (Not Sequential) may be set to one if the next read stream command with the
same Stream ID may not be sequential in LBA space.

HSE (bit4)

Sector Number Current
Sector Number Previous
Cylinder Low Current

HSE (Handle Stream Error) specifies that this command starts at the LBA of the
last reported error for this stream, so the device may attempt to continue its
corresponding error recovery sequence where it left off earlier.
Stream ID specifies the stream to be read. The device shall operate according
to the Stream ID set by the Read Stream command.
The time allowed for the current command‟s completion is calculated as follows:
Command Completion Time Limit = (content of the Feature register
Previous) * (Identify Device words (99:98)) useconds
If the value is zero, the device shall use the Default CCTL supplied with a
previous Configure Stream command for this Stream ID. If the Default CCTL
is zero, or no previous Configure Stream command was defined for this Stream
ID, the drive will ignore the CCTL. The time is measured from the write of the
command register to the final INTRQ for command completion. The device has
minimum CCTL value. When the specified value is shorter than the minimum
value, CCTL is set to the minimum value. Actual minimum CCTL value is
described in the “Deviations from Standard” section.
The number of continuous sectors to be transferred low order, bits (7:0)
The number of continuous sectors to be transferred high order, bits (15:8). If
zero is specified in the Sector Count register, then 65,536 sectors will be
transferred.
LBA (7:0).
LBA (31:24).
LBA (15:8).

Cylinder Low Previous
Cylinder High Current
Cylinder High Previous

LBA (39:32).
LBA (23:16).
LBA (47:40).

Stream ID (bit 0..2)
Feature Previous
CCTL (7:0)

Sector Count Current
Sector Count Previous

Hitachi hard disk drive specifications
168

Cylinder Low (HOB=1)
Cylinder High (HOB=0)
Cylinder High (HOB=1)
CCTO (Error, bit 0)
SE (Status, bit 5)

LBA (39:32) of the address of the first unrecoverable error.
LBA (23:16) of the address of the first unrecoverable error.
LBA (47:40) of the address of the first unrecoverable error.
CCTO bit shall be set to one if a Command Completion Time Limit Out error has
occurred.
SE (Stream Error) shall be set to one if an error has occurred during the
execution of the command and the RC bit is set to one, In this case the LBA
returned in the Sector Number registers shall be the address of the first sector in
error, and the Sector Count registers shall contain the number of consecutive
sectors that may contain errors. If the RC bit is set to one when the command
is issued and ICRC, UNC, IDNF, ABRT, or CCTO error occurs, the SE bit shall
be set to one, the ERR bit shall be cleared to zero, and the bits that would
normally be set in the Error register shall be set in the error log.

Hitachi hard disk drive specifications
169

11.26 Read Stream PIO (2Bh)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count
Sector
Number

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Cylinder Low

Sector
Number
Cylinder Low

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

CCTO

BSY

RDY

DWE DRQ
0

COR

IDX

ERR

Table 123 Read Stream PIO Command (2Bh)

The Read Stream DMA command reads one to 65536 sectors as specified in the Sector Count register.
value of 0000h in the Sector Count register requests 65536 sectors.

The RC bit indicates that the drive operate in a continuous read mode for the Read Stream command. When RC
is cleared to zero the drive shall operate in normal Streaming read mode.
When the Read Continuous mode is enabled, the device shall transfer data of the requested length without
setting the ERR bit. The SE bit shall be set to one if the data transferred includes errors. The data may be
erroneous in this case.
If the Read Continuous bit is set to one, the device shall not stop execution of the command due to errors. If
the RC bit is set to one and errors occur in reading or transfer of the data, the device shall continue to transfer
the amount of data requested and then provide ending status with the BSY bit cleared to zero, the SE bit set to
one, the ERR bit cleared to zero, and the type of error, ICRC,UNC,IDNF, or ABRT, reported in the error log. If
the RC bit is set to one and the Command Completion Time Limit expires, the device shall stop execution of the
command and provide ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to
zero, and report the fact that the Command Completion Time Limit expired by setting the CCTO bit in the error
log to one, In all cases, the device shall attempt to transfer the amount of data requested within the Command
Completion Time Limit event if some data transferred is in error.

Hitachi hard disk drive specifications
170

Output Parameters To The Device
Feature Current
URG (bit7)

RC specifies Read Continuous mode enabled. If the Read Continuous bit is set
to one, the device shall not stop execution of the command due to errors.
If the RC bit is set to one and errors occur in reading or transfer of the data, the
device shall continue to transfer the amount of data requested and then provide
ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit
cleared to zero, and the type of error, UNC, IDNF or ABRT reported in the error
log.
If the RC bit is set to one and the CCTL expires, the device shall stop execution of
the command and provide ending status with the BSY bit cleared to zero, the SE
bit set to one, the ERR bit cleared to zero, and report the fact that the CCTL
expired by setting the CCTO bit in the error log to one.
In all cases, the device shall attempt to transfer the amount of data requested
within the CCTL even if some data transferred is in error.

(bit6)

NS (bit5)

NS (Not Sequential) may be set to one if the next read stream command with the
same Stream ID may not be sequential in LBA space.

HSE (bit4)

Stream ID (bit 0..2)

Stream ID specifies the stream to be read. The device shall operate according to
the Stream ID set by the Read Stream command.

Feature Previous
CCTL (7:0)

Sector Count Current
Sector Count Previous
Sector Number Current
Sector Number Previous
Cylinder Low Current
Cylinder Low Previous
Cylinder High Current
Cylinder High Previous

The time allowed for the current command‟s completion is calculated as follows:
Command Completion Time Limit = (content of the Feature register
Previous) * (Identify Device words (99:98)) microseconds
If the value is zero, the device shall use the Default CCTL supplied with a previous
Configure Stream command for this Stream ID. If the Default CCTL is zero, or no
previous Configure Stream command was defined for this Stream ID, the device
will ignore the CCTL. The time is measured from the write of the command
register to command completion. The device has minimum CCTL value. When the
specified value is shorter than the minimum value, CCTL is set to the minimum
value. Actual minimum CCTL value is described in the “Deviations from Standard”
section.
The number of continuous sectors to be transferred low order, bits (7:0)
The number of continuous sectors to be transferred high order, bits (15:8). If zero
is specified in the Sector Count register, then 65,536 sectors will be transferred.
LBA (7:0).
LBA (31:24).
LBA (15:8).
LBA (39:32).
LBA (23:16).
LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)
LBA (31:24) of the address of the first unrecoverable error.
Cylinder Low (HOB=0)
LBA (15:8) of the address of the first unrecoverable error.
Cylinder Low (HOB=1)
LBA (39:32) of the address of the first unrecoverable error.
Cylinder High (HOB=0)
LBA (23:16) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
171

Cylinder High (HOB=1)
CCTO (Error, bit 0)

LBA (47:40) of the address of the first unrecoverable error.
CCTO bit shall be set to one if a Command Completion Time Limit Out error has
occurred.

SE (Status, bit 5)

SE (Stream Error) shall be set to one if an error has occurred during the execution
of the command and the RC bit is set to one. In this case the LBA returned in the
Sector Number registers shall be the address of the first sector in error, and the
Sector Count registers shall contain the number of consecutive sectors that may
contain errors. If the RC bit is set to one when the command is issued and a
UNC, IDNF, ABRT, or CCTO error occurs, the SE bit shall be set to one, the ERR
bit shall be cleared to zero, and the bits that would normally be set in the Error
register shall be set in the error log.

Hitachi hard disk drive specifications
172

11.27 Read Verify Sector(s) (40h/41h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 124 Read Verify Sector(s) Command (40h/41h)
The Read Verify Sector(s) verifies one or more sectors on the device. No data is transferred to the host.
The difference between Read Sector(s) command and Read Verify Sector(s) command is whether the data is
transferred to the host or not.
If an uncorrectable error occurs, the read verify will be terminated at the failing sector.

Hitachi hard disk drive specifications
173

Output Parameters To The Device
Sector Count
The number of continuous sectors to be verified.
sectors will be verified.

If zero is specified, then 256

Sector Number

The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 – 7. (L=1)

Cylinder High/Low

The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 – 15 (Low), 16 – 23 (High). (L=1)

The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 – 27. (L=1)

R
The retry bit, but this bit is ignored.
Input Parameters From The Device
Sector Count
The number of requested sectors not verified.
unrecoverable error occurs.

This will be zero, unless an

Sector Number

The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 – 7. (L=1)

Cylinder High/Low

The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 – 15 (Low), 16 – 23 (High).
(L=1)
The head number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 24 – 27. (L=1)

Hitachi hard disk drive specifications
174

11.28 Read Verify Sector(s) Ext (42h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

Sector
Number

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Cylinder Low

Sector
Number

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ COR
-

IDX

ERR

Table 125 Read Verify Sector(s) Ext Command (42h)
The Read Verify Sector(s) Ext verifies one or more sectors on the device. No data is transferred to the host.
The difference between the Read Sector(s) Ext command and the Read Verify Sector(s) Ext command is
whether the data is transferred to the host or not.
If an uncorrectable error occurs, the Read Verify Sector(s) Ext will be terminated at the failing sector.

Hitachi hard disk drive specifications
175

Output Parameters To The Device
Sector Count Current
Sector Count Previous
Sector Number Current

The number of continuous sectors to be verified low order, bits (7:0).
The number of continuous sectors to be verified high order, bits (15:8). If zero
is specified in the Sector Count register, then 65,536 sectors will be verified.
LBA (7:0).

Sector Number Previous

LBA (31:24)

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
176

11.29 Recalibrate (1xh)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 126 Recalibrate Command (1xh)
The Recalibrate command moves the read/write heads from anywhere on the disk to cylinder 0.
If the device cannot reach cylinder 0, T0N (Track 0 Not Found) will be set in the Error Register.

Hitachi hard disk drive specifications
177

11.30 Security Disable Password (F6h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
V

0
ERR

Table 127 Security Disable Password Command (F6h)
The Security Disable Password command disables the security mode feature (device lock function).
The Security Disable Password command requests a transfer of a single sector of data from the host including
information specified in Table 126 on the page 177. Then the device checks the transferred password. If the
User Password or Master Password matches the given password, the device disables the security mode feature
(device lock function). This command does not change the Master Password which may be re-activated later by
setting User Password. This command should be executed in device unlock mode.
When security is disabled and the Identifier bit is set to User, then the device shall return command aborted.

Hitachi hard disk drive specifications
178

Word

Description

Control word
bit 0
bit 1-15

01-16

Password

17-255

Reserved

: Identifier (1-Mater, 0-User)
: Reserved
(32 bytes)

Table 128 Password Information for Security Disable Password command

The device will compare the password sent from this host with that specified in the control word.
Identifier

Zero indicates that the device should check the supplied password against the user password
stored internally. One indicates that the device should check the given password against the
master password stored internally.

Hitachi hard disk drive specifications
179

11.31 Security Erase Prepare (F3h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
V

0
ERR
V

Table 129 Security Erase Prepare Command (F3h)
The Security Erase Prepare Command must be issued immediately before the Security Erase Unit Command to
enable device erasing and unlocking.
The Security Erase Prepare Command must be issued immediately before the Format Unit Command. This
command is to prevent accidental erasure of the device.
This command does not request to transfer data.

Hitachi hard disk drive specifications
180

11.32 Security Erase Unit (F4h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 130 Security Erase Unit Command (F4h)
The Security Erase Unit command initializes all user data sectors, and then disables the device lock function.
Note that the Security Erase Unit command initializes from LBA 0 to Native MAX LBA. Host MAX LBA set by
Initialize Drive Parameter, Device Configuration Overlay, or Set MAX Address command is ignored. So the
protected area by Set MAX Address command is also initialized.
This command requests to transfer a single sector data from the host including information specified in Table
130 on the page 181.
When security is disabled and the Identifier bit is set to User, then the device shall return command aborted.

Hitachi hard disk drive specifications
181

If the password does not match, then the device rejects the command with an Aborted error.
Word

Description

Control word
bit 0

01-16
17-255

: Identifier (1-Mater, 0-User)

bit 1

: Erase mode (1- Enhanced, 0- Normal)
Enhanced mode is not supported

bit 2-15

: Reserved

Password
Reserved

(32 bytes)

Table 131 Erase Unit Information

Identifier

Zero indicates that the device should check the supplied password against the user
password stored internally. One indicates that the device should check the given password
against the master password stored internally.

The Security Erase Unit command erases all user data and disables the security mode feature (device lock
function). So after completing this command, all user data will be initialized to zero with write operation. At this
time, it is not verified with read operation whether the sector of data is initialized correctly. Also, the defective
sector information and the reassigned sector information for the device are not updated. The security erase
prepare command should be completed immediately prior to the Security Erase Unit command. If the device
receives a Security Erase Unit command without a prior Security Erase Prepare command, the device aborts
the security erase unit command.
This command disables the security mode feature (device lock function), however the master password is still
stored internally within the device and may be re-activated later when a new user password is set. If you execute
this command on disabling the security mode feature (device lock function), the password sent by the host is
NOT compared with the password stored in the device for both the Master Password and the User Password,
and then the device only erases all user data.
The execution time of this command is set in word 89 of Identify device information.

Hitachi hard disk drive specifications
182

11.33 Security Freeze Lock (F5h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 132 Security Freeze Lock Command (F5h)
The Security Freeze Lock Command allows the device to enter frozen mode immediately.
After this command is completed, the command which updates Security Mode Feature (Device Lock Function) is
rejected.
Frozen mode is quit only by Power off.
The following commands are rejected when the device is in frozen mode. For detail, refer to Table 37 and Table
38 on the page 6566.
Security Set Password
Security Unlock
Security Disable Password
Security Erase Unit

Hitachi hard disk drive specifications
183

11.34 Security Set Password (F1h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 133 Security Set Password Command (F1h)
The Security Set Password command enables security mode feature (device lock function), and sets the master
password or the user password.
The security mode feature (device lock function) is enabled by this command, and the device is not locked
immediately. The device is locked after next power on reset. When the MASTER password is set by this
command, the master password is registered internally, but the device is NOT locked after next power on reset
or hard reset.
This command requests a transfer of a single sector of data from the host including the information specified in
Table 133 on the page 184.
The data transferred controls the function of this command.

Hitachi hard disk drive specifications
184

Word

Description

Control word
bit 0

: Identifier (1-Mater, 0-User)

bit 1-7

: Reserved

bit 8

: Security level
(1-Maximum, 0-High)
: Reserved

bit 9-15
01-16
17
18-255

Password
(32 byte)
Master Password Revision Code
(valid if Word 0 bit 0 = 1)
Reserved

Table 134 Security Set Password Information

Identifier

Zero indicates that the device regards Password as User Password. One indicates
that device regards Password as Master Password.

Security Level

Zero indicates High level, one indicates Maximum level. If the host sets High level
and the password is forgotten, then the Master Password can be used to unlock the
device. If the host sets Maximum level and the user password is forgotten, only an
Security Erase Prepare/Security Unit command can unlock the device and all data
will be lost.

Password
Master Password
Revision Code

The text of the password – all 32 bytes are always significant.
The revision code field is returned in the IDENTIFY DEVICE word 92.
The valid revision codes are 0001h through FFFEh. The device accepts the
command with a value of 0000h or FFFFh in this field, but does not change Master
Password Revision code.

The setting of the Identifier and Security level bits interact as follows.
Identifier=User / Security level = High
The password supplied with the command will be saved as the new user password. The security mode feature
(lock function) will be enabled from the next power on. The file may then be unlocked by either the user
password or the previously set master password.
Identifier=Master / Security level = High
This combination will set a master password but will NOT enable the security mode feature (lock function).
Identifier=User / Security level = Maximum
The password supplied with the command will be saved as the new user password. The security mode feature
(lock function) will be enabled from the next power on. The file may then be unlocked by only the user
password. The master password previously set is still stored in the file but may NOT be used to unlock the
device.
Identifier=Master / Security level = Maximum
This combination will set a master password but will NOT enable the security mode feature (lock function).

Hitachi hard disk drive specifications
185

11.35 Security Unlock (F2h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR
-

IDX

ERR

Table 135 Security Unlock Command (F2h)
This command unlocks the password and causes the device to enter device unlock mode. If power on reset or
hard reset is done without executing the Security Disable Password command after this command is completed,
the device will be in device lock mode. The password has not been changed yet.
The Security Unlock command requests to transfer a single sector of data from the host including information
specified in Table 135 on the page 186.
If the Identifier bit is set to master and the file is in high security mode then the password supplied will be
compared with the stored master password. If the file is in maximum security mode then the security unlock will
be rejected.
If the Identifier bit is set to user, then the file compares the supplied password with the stored user password.
If the password compare fails, then the device returns an abort error to the host and decrements the unlock
attempt counter. This counter is initially set to 5 and is decremented for each password mismatch.
When security is disabled and the Identifier bit is set to User, then the device shall return command aborted.

Hitachi hard disk drive specifications
186

When this counter reaches zero then all password protected commands are rejected until a hard reset or a
power off.
Word

Description

Control word
bit 0
bit 1-15

01-16
17-255

: Identifier (1-Mater, 0-User)
: Reserved

Password
Reserved

(32 bytes)

Table 136 Security Unlock Information

Identifier

Zero indicates that device regards Password as User Password. One indicates that device
regards Password as Master Password.

The user can detect if the attempt to unlock the device has failed due to a mismatched password as this is the
only reason that an abort error will be returned by the file AFTER the password information has been sent to the
device. If an abort error is returned by the device BEFORE the password data has been sent to the file then
another problem exists.

Hitachi hard disk drive specifications
187

Seek (7xh)

11.36

Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 137 Seek Command (7xh)
The Seek command initiates a seek to the designated track and selects the designated head. The device need
not be formatted for a seek to execute properly.
Output Parameters To The Device
Sector Number
In LBA mode, this register specifies LBA address bits 0 – 7 for seek. (L=1)
Cylinder High/Low
The cylinder number of the seek.
In LBA mode, this register specifies LBA address bits 8 – 15 (Low), 16 – 23 (High)
for seek. (L=1)
H
The head number of the seek.
In LBA mode, this register specifies LBA address bits 24 – 27 for seek. (L=1)
Input Parameters From The Device
Sector Number
In LBA mode, this register contains current LBA bits 0 – 7. (L=1)
Cylinder High/Low
In LBA mode, this register contains current LBA bits 8 – 15 (Low), 16 – 23 (High).
(L=1)
H
In LBA mode, this register contains current LBA bits 24 – 27. (L=1)

Hitachi hard disk drive specifications
188

11.37 Sense Condition (F0h : Vendor specific for Cinemastar)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
V

5
DF
V

DSC DRQ COR
-

IDX

ERR

Table 138 Sense Condition command (F0h)
The Sense Condition command is used to sense temperature in a device.
This command is executable even if a device is in Power up in standby mode.
Output Parameters To The Device
Feature
The Feature register must be set to 01h. All other value are rejected
with setting ABORT bit in status register.
Input Parameters From The Device
Sector Count
The Sector Count register contains result value.
Value
Description
00h

Temperature is equal to or lower than -20 degC

01h-FEh

Temperature is (Value / 2 - 20) deg C

FFh

Temperature is higher than 107 degC

Hitachi hard disk drive specifications
189

11.37.1 Set Features (EFh)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Note.1

…See Below…

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
-

IDX

ERR

Table 139 Set Features Command (EFh)
The Set Feature command is to establish the following parameters which affect the execution of certain features
as shown in below table.
ABT will be set to 1 in the Error Register if the Feature register contains any undefined values.

Hitachi hard disk drive specifications
190

Output Parameters To The Device
Feature

Destination code for this command
02H

Enable write cache

03H

Set transfer mode based on value in sector count register

05H

Enable Advanced Power Management

06H

Enable Power-up in Standby feature set

07H

Power-Up In Standby feature set device spin-up

10H

Enable use of Serial ATA feature

43H

Set Maximum Host Interface Sector Time

55H

Disable read look-ahead feature

66H

Disable reverting to power on defaults

82H

Disable write cache

85H

Disable Advanced Power Management

86H

Disable Power-up in Standby mode

90H

Disable use of Serial ATA feature

AAH

Enable read look-ahead feature

CCH

Enable reverting to power on defaults

Note.
After power on reset or hard reset, the device is set to the following features as default.
Write cache
Read look-ahead
Reverting to power on defaults
Release interrupt

: Enable
: Enable
: Disable
: Disable

Hitachi hard disk drive specifications
191

11.37.2 Set Transfer mode
When Feature register is 03h (=Set Transfer mode), the Sector Count Register specifies the transfer mechanism.
The upper 5 bits define the type of transfer and the low order 3 bits encode the mode value.
PIO Default Transfer Mode
PIO Default Transfer Mode
Disable IORDY
PIO Flow Control Transfer Mode x
Multiword DMA mode x
Ultra DMA mode x

00000
00000

000
001

00001
00100
01000

nnn
nnn
nnn

(nnn=000,001,010,011,100)
(nnn=000,001,010)
(nnn=000,001,010,011,100,101,11
0)

11.37.3 Write Cache
If the number of auto reassigned sector reaches the device‟s reassignment capacity, the write cache function
will be automatically disabled. Although the device still accepts the Set Features command with Feature register
= 02h without error, but the write cache function will remains disabled. For current write cache function status,
please refer to Identify Device Information (word 85 or 129) by Identify Device command.

11.37.4 Serial ATA Feature
When the Feature register is set to 10h or 90h, the value set to the Sector Count register specifies the specific
Serial ATA feature to enable or disable.
Sector Count Value

Description

01h

Non-zero buffer offset in DMA Setup FIS

02h

DMA Setup FIS Auto-Activate optimization

03h

Device-initiated interface power state transitions

04h

Guaranteed In-Order Data Delivery

06h

Software Settings Preservation

11.37.5 Advanced Power Management
When the value in the Feature register is 05h (=Enable Advanced Power Management), the Sector Count
Register specifies the Advanced Power Management level.
FFh ---

Aborted

C0 – Feh --80 – BFh ---

The deepest Power Saving mode is Normal Idle mode
(the same as Disable Advanced Power Management)
The deepest Power Saving mode is Low power Idle mode

01 – 7Fh ---

The deepest Power Saving mode is Low RPM standby mode

00h ---

Aborted

The idle time to Low power idle mode and Low RPM standby mode vary according to the value in Sector Count
register as follows:
When Low power idle mode is the deepest Power Saving mode,
Y1=(x-80h) * 5+120 [sec]

(120<= Y1<=435)

Y2=N/A(the device does not go to Low RPM standby mode)
When Low RPM standby mode is the deepest Power Saving mode and the value in Sector Count register is
between 40h and 7Fh,
120<=Y1<=435 [sec]

(default: 120 [sec])

Hitachi hard disk drive specifications
192

Y2=(x-40h) * 60 + 600[sec]

(600<=Y2<=4380)

When Low RPM standby mode is the deepest Power Saving mode and the value in Sector Count register is
between 01h and 3Fh,
120<=Y1<=435 [sec]

(default: 120 [sec])

Y2=600 [sec]
where x is the value in Sector Count register, y1 is the idle time to Low Power Idle mode, and y2 is the idle time
to Low RPM standby mode.
If Low power idle mode has already been enabled (i.e., y1 has been set) before Low RPM standby mode is
enabled, y1 is preserved. If Low power idle mode is disabled (i.e., y1 has not been set yet), y1 becomes 120[sec]
when Low RPM standby mode is enabled.
Enabled Power Saving mode and idle time (y1 and y2) are preserved until Advanced Power Management is
disabled, the deepest Power Saving mode becomes Normal Idle mode, or new time is set. They are initialized
with a hard/soft reset unless Reverting to power on defaults is disabled and the device receives a soft reset.

11.37.5.1

Low Power Idle mode

Additional electronics are powered off, and heads are unloaded on the ramp, however the spindle is still rotated
at the full speed.

11.37.5.2

Low RPM standby mode

The heads are unloaded on the ramp, and the spindle is rotated at the 60-65% of the full speed.
When Feature register is 85h (=Disable Advanced Power Management), the deepest Power Saving mode
becomes normal Idle.

11.37.6 Set Maximum Host Interface Sector Time
Sector Count

Typical PIO Mode Host Interface Sector Time (7:0)

LBA Low

Typical PIO Mode Host Interface Sector Time (15:8)

LBA Mid

Typical DMA Mode Host Interface Sector Time (7:0)

LBA High
Typical DMA Mode Host Interface Sector Time (15:8)
Subcommand code 43h allows the host to inform the device of a host interface rate limitation. The typical Host
Interface Sector Times have the same units as Identify Device word 96 for DMA and word 104 for PIO. A value of
zero indicates that the host interface shall be capable of transferring data at the maximum rate allowed by the
selected transfer mode. The Typical PIO Mode Host Interface Sector Time includes the host‟s interrupt service
time.

Hitachi hard disk drive specifications
193

11.38 Set Max Address (F9h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 140 Set Max ADDRESS (F9h)
The device regards as Set Max Address command, if this command is immediately preceded by a Read Native
Max Address command. The device receives this command without a prior Read Native Max Address command,
the device regards as Set Max security extensions command according to feature register value. Valid features
values are as follows:
1.
2.
3.
4.

01h indicates Set Max Set Password command
02h indicates Set Max Lock command
03h indicates Set Max Unlock command
04h indicates Set Max Freeze LOCK command

This command overwrites the maximum number of Address of HDD in a range of actual device capacity. Once
device receives this command, all accesses beyond that Address are rejected with setting ABORT bit in status
register. Identify device command returns the Address which is set via this command as a default value.
Device returns command aborted for a second non-volatile Set Max Address command until next power on or
hardware reset.
Device returns command aborted during Set Max Locked mode or Set Max Frozen mode.
After a successful command completion, Identify Device response words (61:60) shall reflect the maximum
address set with this command.
If the 48-bit Address feature set is supported, the value placed in Identify Device response words (103:100) shall
be the same as the value placed in words (61:60). However, if the device contains greater than 268,435,455
sectors, the capacity addressable with 28-bit commands, and the address requested is 268,435,455, the max

Hitachi hard disk drive specifications
194

address shall be changed to the native maximum address, the value placed in words (61:60) shall be
268,435,455 and the value placed in words (103:100) shall be the native maximum address.
If a host protected area has been established by a Set Max Address Ext command, the device shall return
command aborted.
Output Parameters To The Device
B

Option bit for selection whether nonvolatile or volatile. B=0 is volatile condition. When
B=1, MAX Address which is set by Set Max Address command is preserved by POR.
When B=0, MAX Address which is set by Set Max Address command will be lost by
POR. B=1 is not valid when the device is in Address Offset mode.

Sector Number
Cylinder High/Low

In LBA mode, this register contains LBA bits 0 – 7 which is to be input.(L=1)
In CHS mode, this register is ignored. (L=0)
In LBA mode, this register contains LBA bits 8 – 15 (Low), 16 – 23 (High) which is to be
set. (L=1)
In CHS mode, this register contains cylinder number which is to be set.(L=0)

In LBA mode, this register contains LBA bits 24 – 27 which is to be set.(L=1)
In CHS mode, this register is ignored. (L=0)

Input Parameters From The Device

Cylinder High/Low

In LBA mode, this register contains max LBA bits 0 – 7 which is set.(L=1)
In CHS mode, this register contains max sector number (= 63). (L=0)
In LBA mode, this register contains max LBA bits 8 – 15 (Low), 16 – 23 (High) which is
set. (L=1)
In CHS mode, this register contains max cylinder number which is set. (L=0)

In LBA mode, this register contains max LBA bits 24 – 27 which is set. (L=1)
In CHS mode, this register contains max head number.(L=0)

Sector Number

Hitachi hard disk drive specifications
195

11.38.1 Set Max Set Password (Feature = 01h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX ERR
-

Table 141 Set Max set Password

The device regards as Set Max Address command, if this command is immediately preceded by a Read Native
Max Address command.
This command requests a transfer of a single sector of data from the host including the information specified in
Table 141.
The password is retained by the device until the next power cycle. When the device accepts this command the
device is in Set_Max_Unlocked state.
Word
0
01-16
17-255

Description
Reserved
Password (32 byte)
Reserved

Table 142 Set Max Set Password data contents

Hitachi hard disk drive specifications
196

11.38.2 Set Max Lock (Feature = 02h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
-

IDX

ERR

Table 143 Set Max Lock

The device regards as Set Max Address command, if this command is immediately preceded by a Read Native
Max Address command.
This command sets the device into Set_Max_Locked state. After this command is completed any other Set Max
commands except Set Max Unlock and Set Max Freeze Lock are rejected. The device remains in this state until
a power cycle or the acceptance of a Set Max Unlock or Set Max Freeze Lock command.

Hitachi hard disk drive specifications
197

11.38.3 Set Max Unlock (Feature = 03h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
-

0
ERR
V

Table 144 Set Max Unlock (F9h)
The device regards as Set Max Address command, if this command is immediately preceded by a Read Native
Max Address command.
This command requests a transfer of a single sector of data from the host including the information specified in
Table 141 on the page 196 with the stored SET MAX password.
If the password compare fails then the device returns an abort error to the host and decrements the unlock
attempt counter. This counter is initially set to 5 and is decremented for each password mismatch. When this
counter reaches zero then all Set Max Unlock commands are rejected until a hard reset or a power off.
If the password compares matches, then the device set the Set_Max_Unlocked state and all Set Max
commands shall be accepted.

Hitachi hard disk drive specifications
198

11.38.4 Set Max Freeze Lock (Feature = 04h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
-

IDX

ERR

Table 145 Set Max Freeze Lock (F9h)

The device regards as Set Max Address command, if this command is immediately preceded by a Read Native
Max Address command.
The Set Max Freeze Lock command sets the device to Set_Max_Frozen state. After command completion any
subsequent Set Max commands are rejected. Commands disabled by Set Max Freeze Lock are:
1.
2.
3.
4.

Set Max Address
Set Max Set PASSWORD
Set Max Lock
Set Max Unlock

Hitachi hard disk drive specifications
199

11.39 Set Max Address Ext (37h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Feature

Sector Count

Current

Sector
Number

Current
Cylinder Low

Previous
Current

V
V

…See Below…
HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

Sector Count
Sector
Number

HOB=1

HOB=0

HOB=1

Cylinder Low

Device/Head

Command

Status

Cylinder High

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 146 Set Max Address Ext Command (37h)
This command is immediately preceded by a Read Native Max Address Ext command.
This command overwrites the maximum number of Address of HDD in a range of actual device capacity. Once
device receives this command, all accesses beyond that Address are rejected with setting ABORT bit in status
register.
When the address requested is greater than 268,435,455, words (103:100) shall be modified to reflect the
requested value, but words (61:60) shall not be modified. When the address requested is equal to or less than
268,435,455, words (103:100) shall be modified to reflect the requested value, and words (61:60) shall also be
modified.
If this command is not supported, the maximum value to be set exceeds the capacity of the device, a host
protected area has been established by a Set Max Address command, the command is not immediately
preceded by a Read Native Max Address Ext command, or the device is in the Set Max Locked or Set Max
Frozen state, the device shall return command aborted.
The device returns the command aborted for a second non-volatile Set Max Address Ext command until next
power on or hardware reset.

Hitachi hard disk drive specifications
200

Output Parameters To The Device
B

Sector Number Current

Option bit for selection whether nonvolatile or volatile. B=0 is volatile condition.
When B=1, MAX Address which is set by Set Max Address Ext command is
preserved by POR. When B=0, MAX Address which is set by Set Max Address
Ext command will be lost by POR. B=1 is not valid when the device is in Address
Offset mode.
Set Max LBA (7:0).

Sector Number Previous

Set Max LBA (31:24).

Cylinder Low Current

Set Max LBA (15:8).

Cylinder Low Previous

Set Max LBA (39:32).

Cylinder High Current

Set Max LBA (23:16).

Cylinder High Previous

Set Max LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)

Set Max LBA (7:0).

Sector Number (HOB=1)

Set Max LBA (31:24).

Cylinder Low (HOB=0)

Set Max LBA (15:8).

Cylinder Low (HOB=1)

Set Max LBA (39:32).

Cylinder High (HOB=0)

Set Max LBA (23:16).

Cylinder High (HOB=1)

Set Max LBA (47:40).

Hitachi hard disk drive specifications
201

11.40 Set Multiple (C6h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR IDX ERR
-

Table 147 Set Multiple Command (C6h)
The Set Multiple command enables the device to perform Read and Write Multiple commands and establishes
the block size for these commands. The block size is the number of sectors to be transferred for each interrupt.
If an invalid block size is specified, an Abort error will be returned to the host, and Read Multiple and Write
Multiple commands will be disabled.
Output Parameters To The Device
Sector Count. The block size to be used for Read Multiple and Write Multiple commands. Valid block
sizes can be selected from 0, 1, 2, 4, 8 or 16. If 0 is specified, then Read Multiple and
Write Multiple commands are disabled.

Hitachi hard disk drive specifications
202

11.41 Sleep (E6h/99h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
V

0
ERR
V

Table 148 Sleep Command (E6h/99h)
This command causes the device to enter Sleep Mode.
The device is spun down and the interface becomes inactive. If the device is already spun down, the spin down
sequence is not executed.
The only way to recover from Sleep Mode is with a software reset or a hardware reset.

Hitachi hard disk drive specifications
203

11.42 SMART Function Set (B0h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR IDX
V

0
ERR
V

Table 149 SMART Function Set Command (B0h)
The SMART Function Set command provides access to Attribute Values, Attribute Thresholds and other low
level subcommands that can be used for logging and reporting purposes and to accommodate special user
needs. The SMART Function Set command has several separate subcommands which are selectable via the
device‟s Features Register when the SMART Function Set command is issued by the host.

Hitachi hard disk drive specifications
204

11.42.1 SMART Subcommand
In order to select a subcommand the host must write the subcommand code to the device‟s Features Register
before issuing the SMART Function Set command. The subcommands and their respective codes are listed
below.
Code
D0h

Subcommand
SMART Read Attribute Values

D1h

SMART Read Attribute Thresholds

D2h

SMART Enable/disable Attribute Autosave

D3h

SMART Save Attribute Values

D4h

SMART Execute Off-line Immediate

D5h

SMART Read Log Sector

D6h

SMART Write Log Sector

D8h

SMART Enable Operations

D9h

SMART Disable Operations

Dah

SMART Return Status

DBh

SMART Enable/Disable Automatic Off-Line

11.42.1.1 SMART Read Attribute Values (Subcommand D0h)
This subcommand returns the device‟s Attribute Values to the host. Upon receipt of the SMART Read Attribute
Values subcommand from the host, the device saves any updated Attribute Values to the Attribute Data sectors,
and then transfers the 512 bytes of Attribute Value information to the host.

11.42.1.2 SMART Read Attribute Thresholds (Subcommand D1h)
This subcommand returns the device‟s Attribute Thresholds to the host. Upon receipt of the SMART Read
Attribute Thresholds subcommand from the host, the device reads the Attribute Thresholds from the Attribute
Threshold sectors, and then transfers the 512 bytes of Attribute Thresholds information to the host.

11.42.1.3 SMART Enable/Disable Attribute Autosave (Subcommand D2h)
This subcommand enables and disables the attribute autosave feature of the device. The SMART
Enable/Disable Attribute Autosave subcommand either allows the device to automatically save its updated
Attribute Values to the Attribute Data Sector periodically; or this subcommand causes the autosave feature to be
disabled. The state of the Attribute Autosave feature (either enabled or disabled) will be preserved by the device
across power cycle.
A value of 00h written by the host into the device‟s Sector Count Register before issuing the SMART
Enable/Disable Attribute Autosave subcommand will cause this feature to be disabled. Disabling this feature
does not preclude the device from saving Attribute Values to the Attribute Data sectors during some other
normal operation such as during a power-up or power-down.
A value of F1h written by the host into the device‟s Sector Count Register before issuing the SMART
Enable/Disable Attribute Autosave subcommand will cause this feature to be enabled. Any other non-zero value
written by the host into this register before issuing the SMART Enable/Disable Attribute Autosave subcommand
will not change the current Autosave status but the device will respond with the error code specified in 0.
The SMART Disable Operations subcommand disables the autosave feature along with the device‟s SMART
operations.
Upon the receipt of the subcommand from the host, the device asserts BSY, enables or disables the Autosave
feature, clears BSY and asserts INTRQ.

Hitachi hard disk drive specifications
205

11.42.1.4 SMART Save Attribute Values (Subcommand D3h)
This subcommand causes the device to immediately save any updated Attribute Values to the device‟s Attribute
Data sector regardless of the state of the Attribute Autosave feature. Upon receipt of the SMART Save Attribute
Values subcommand from the host, the device writes any updated Attribute Values to the Attribute Data sector.

11.42.1.5 SMART Execute Off-line Immediate (Subcommand D4h)
This subcommand causes the device to immediately initiate the set of activities that collect Attribute data in an
off-line mode (off-line routine) or execute a self-test routine in either captive or off-line mode.
The Sector Number register shall be set to specify the operation to be executed.
Sector Number

Operation to be executed

Execute SMART off-line data collection routine immediately

Execute SMART Short self-test routine immediately in off-line mode

Execute SMART Extended self-test routine immediately in off-line mode

4
127

Execute SMART Selective self-test routine immediately in off-line mode
Abort off-line mode self-test routine

129

Execute SMART Short self-test routine immediately in captive mode

130

Execute SMART Extended self-test routine immediately in captive mode

132

Execute SMART Selective self-test routine immediately in captive mode

Off-line mode: The device executes command completion before executing the specified routine. During
execution of the routine the device will not set BSY nor clear DRDY. If the device is in the process of performing
its routine and is interrupted by a new command from the host, the device will abort or suspend its routine and
service the host within two seconds after receipt of the new command. After servicing the interrupting command,
the device will resume its routine automatically or not start its routine depending on the interrupting command.
Captive mode: When executing self-test in captive mode, the device sets BSY to one and executes the
specified self-test routine after receipt of the command. At the end of the routine, the device sets the execution
result in the Self-test execution status byte (0) and ATA registers as below and executes command completion.
Status
Error
Cyl Low
Cyl High

Set ERR to one when self-test has failed
Set ABRT to one when self-test has failed
Set to F4h when self-test has failed
Set to 2Ch when self-test has failed

Hitachi hard disk drive specifications
206

11.42.1.6 SMART Read Log Sector (Subcommand D5h)
This command returns the specified log sector contents to the host.
The 512 bytes data are returned at a command and the Sector Count value shall be set to one. The Sector
Number shall be set to specify the log sector address.
Log sector address

Content

Type

00h

Log directory

Read Only

01h

Summary SMART Error Log

Read Only

03h

Extended Comprehensive SMART Error Log

See Note

06h

SMART Self-test Log

Read Only

07h

Extended Self-test Log

See Note

09h

Selective self-test Log

Read/Write

Host vendor specific

Read/Write

80h-9Fh

Note: Log addresses 03h and 07h are used by the Read Log Ext and Write Log Ext commands. If these log
addresses are used with the SMART Read Log Sector command, the device shall return command aborted.

Table 150 Log sector addresses

11.42.1.7 SMART Write Log Sector (Subcommand D6h)
This command writes 512 bytes data to the specified log sector.
The 512 bytes data are transferred at a command and the Sector Count value shall be set to one. The Sector
Number shall be set to specify the log sector address (0). If Read Only log sector is specified, the device returns
ABRT error

11.42.1.8 SMART Enable Operations (Subcommand D8h)
This subcommand enables access to all SMART capabilities within the device. Prior to receipt of a SMART
Enable Operations subcommand, Attribute Values are neither monitored nor saved by the device. The state of
SMART (either enabled or disabled) will be preserved by the device across power cycles. Once enabled, the
receipt of subsequent SMART Enable Operations subcommands will not affect any of the Attribute Values.
Upon receipt of the SMART Enable Operations subcommand from the host, the device enables SMART
capabilities and functions, and then saves any updated Attribute Values to the Attribute Data sector.

Hitachi hard disk drive specifications
207

11.42.1.9 SMART Disable Operations (Subcommand D9h)
This subcommand disables all SMART capabilities within the device including the device‟s attribute autosave
feature. After receipt of this subcommand the device disables all SMART operations. Non self-preserved
Attribute Values will no longer be monitored. The state of SMART (either enabled or disabled) is preserved by
the device across power cycles.
Upon receipt of the SMART Disable Operations subcommand from the host, the device disables SMART
capabilities and functions, and then saves any updated Attribute Values to the Attribute Data sector.
After receipt of the device of the SMART Disable Operations subcommand from the host, all other SMART
subcommands – with the exception of SMART Enable Operations – are disabled, and invalid and will be aborted
by the device (including the SMART Disable Operations subcommand), returning the error code as specified in
0 on the page 221.
Any Attribute Values accumulated and saved to volatile memory prior to receipt of the SMART Disable
Operations command will be preserved in the device‟s Attribute Data Sectors. If the device is re-enabled, these
Attribute Values will be updated, as needed, upon receipt of a SMART Read Attribute Values or SMART Save
Attribute Values command.

11.42.1.10 SMART Return Status (Subcommand Dah)
This command is used to communicate the reliability status of the device to the host‟s request. Upon receipt of
the SMART Return Status subcommand the device saves any updated Pre-failure type Attribute Values to the
reserved sector and compares the updated Attribute Values to the Attribute Thresholds.
If the device does not detect a Threshold Exceeded Condition, the device loads 4Fh into the Cylinder Low
register, C2h into the Cylinder High register.
If the device detects a Threshold Exceeded Condition, the device loads F4h into the Cylinder Low register, 2Ch
into the Cylinder High register.

11.42.1.11 SMART Enable/Disable Automatic Off-Line (Subcommand DBh)
This subcommand enables and disables the optional feature that causes the device to perform the set of off-line
data collection activities that automatically collect attribute data in an off-line mode and then save this data to the
device‟s non-volatile memory. This subcommand may either cause the device to automatically initiate or resume
performance of its off-line data collection activities or cause the automatic off-line data collection feature to be
disabled.
A value of zero written by the host into the device‟s Sector Count Register before issuing this subcommand shall
cause the feature to be disabled. Disabling this feature does not preclude the device from saving attribute values
to non-volatile memory during some other normal operation such as during a power-on or power-off sequence or
during an error recovery sequence.
A value of F8h written by the host into the device‟s Sector Count Register before issuing this subcommand shall
cause this feature to be enabled. Any other non-zero value written by the host into this register before issuing
this subcommand is vender specific and will not change the current Automatic Off-Line Data Collection, but the
device may respond with the error code specified in 0 on the page.221

Hitachi hard disk drive specifications
208

11.42.2 Device Attributes Data Structure
The following defines the 512 bytes that make up the Attribute Value information. This data structure is
accessed by the host in its entirety using the SMART Read Attribute Values subcommand. All multi-byte fields
shown in these data structures are in byte ordering, namely that the least significant byte occupies the lowest
numbered byte address location in the field.
Description

Bytes

Data Structure Revision Number

Offset

00h

02h

…

1 Device Attribute
…

Value
0010h

..
th

30 Device Attribute

15Eh

Off-line data collection status

16Ah

Self-test execution status

16Bh

Total time in seconds to complete off-line data collection activity

16Ch

Vender specific

16Eh

Off-line data collection capability

16Fh

1Bh

SMART capability

170h

0003h

SMART device error logging capability

172h

01h

Self-test failure check point

173h

Short self-test completion time in minutes
Extended self-test completion time in minutes. If 0FFh, use bytes 177h and 178h for
completion time.
Reserved

174h

175h

176h

Extended self-test completion time in minutes. (word)

177h

Reserved

179h

Vendor specific
Data structure checksum

125

182h

1FFh

512

Table 151 Device Attribute Data Structure

11.42.2.1 Data Structure Revision Number
The Data Structure Revision Number identifies which version of this data structure is implemented by the device.
This revision number identifies both the Attribute Value and Attribute Threshold Data structures.

Hitachi hard disk drive specifications
209

11.42.2.2 Individual Attribute Data Structure
The following defines the 12 bytes that make up the information for each Attribute entry in the Device Attribute
Data Structure.
Description

Bytes

Offset

Attribute ID Number (01h to FFh)

00h

Status Flags

01h

Attribute Value (valid values from 01h to FDh)

03h

Vender specific

04h

Total Bytes

Table 152 Individual Attribute Data Structure
Attribute ID Numbers: Any non-zero value in the Attribute ID Number indicates an active attribute. The device
supports following Attribute ID Numbers.
ID
0
1
2
3
4
5
7
8
9
10
12
192

Attribute Name
Indicates that this entry in the data structure is not used
Raw Read Error Rate
Throughput Performance
Spin Up Time
Start/Stop Count
Reallocated Sector Count
Seek Error Rate
Seek Time Performance
Power-On Hours Count
Spin Retry Count
Device Power Cycle Count
Power off Retract count

193

Load Cycle count

194

Temperature

196
197
198
199

Reallocation Event Count
Current Pending Sector Count
Off-Line Scan Uncorrectable Sector Count
Ultra DMA CRC Error Count

Hitachi hard disk drive specifications
210

Status Flag Definitions
Bit
Definition
0

Pre-failure/advisory bit
0

2-5

An Attribute Value less than or equal to its corresponding Attribute Threshold indicates an
advisory condition where the usage or age of the device has exceeded its intended design
life period.
1
An Attribute Value less than or equal to its corresponding attribute threshold indicates a
pre-Failure condition where imminent loss of data is being predicted.
On-Line Collective bit
0
The Attribute Value is updated only during Off-Line testing
1
The Attribute Value is updated during On-Line testing or during both On-Line and Off-Line
testing.
Vendor specific

6-15

Reserved (0)

Normalized Values: The device will perform conversion of the raw Attribute Values to transform them into
normalized values, which the host can then compare with the Threshold values. A Threshold is the excursion
limit for a normalized Attribute Value.

11.42.2.3 Off-Line Data Collection Status
The value of this byte defines the current status of the off-line activities of the device. Bit 7 indicates Automatic
Off-Line Data Collection Status.
Bit 7

Automatic Off-Line Data Collection Status

Automatic Off-Line Data Collection is disabled.

Automatic Off-Line Data Collection is enabled.

Bits 0 thru 6 represents a hexadecimal status value reported by the device.
Value
0

Definition
Off-line data collection never started

All segments completed without errors.

Off-line data collection suspended by interrupting command

Off-line data collecting aborted by interrupting command

Off-line data collection aborted with fatal error

Hitachi hard disk drive specifications
211

11.42.2.4 Self-test execution status
Bit
0-3

4-7

Definition
Percent Self-test remaining
An approximation of the percent of the self-test routine remaining until completion in ten percent
increments. Valid values are 0 through 9.
Current Self-test execution status
0
The self-test routine completed without error or has never been run
1
The self-test routine aborted by the host
2
The self-test routine interrupted by the host with a hard or soft reset
3
The device was unable to complete the self-test routine due to a fatal error or unknown test error
4
The self-test routine completed with unknown element failure
5
The self-test routine completed with electrical element failure
6
The self-test routine completed with servo element failure
7
The self-test routine completed with read element failure
15
The self-test routine in progress

11.42.2.5 Total Time in Seconds to Complete Off-line Data Collection Activity
This field tells the host how many seconds the device requires completing the off-line data collection activity.

11.42.2.6 Off-Line Data Collection Capability
Bit
0

5-7
6

Definition
Execute Off-line Immediate implemented bit
0
SMART Execute Off-line Immediate subcommand is not implemented
1
SMART Execute Off-line Immediate subcommand is implemented
Enable/disable Automatic Off-line implemented bit
0
SMART Enable/disable Automatic Off-line subcommand is not implemented
1
SMART Enable/disable Automatic Off-line subcommand is implemented
abort/restart off-line by host bit
0
The device will suspend off-line data collection activity after an interrupting command and
resume it after some vendor specific event
1
The device will abort off-line data collection activity upon receipt of a new command
Off-line Read Scanning implemented bit
0
The device does not support Off-line Read Scanning
1
The device supports Off-line Read Scanning
Self-test implemented bit
0
Self-test routine is not implemented
1
Self-test routine is implemented
Reserved (0)
Selective self-test implemented bit
0
Selective self-test routine is not implemented
1
Selective self-test routine is implemented

Hitachi hard disk drive specifications
212

11.42.2.7 SMART Capability
This word of bit flags describes the SMART capabilities of the device. The device will return 03h indicating that
the device will save its Attribute Values prior to going into a power saving mode and supports the SMART
ENABLE/DISABLE ATTRIBUTE AUTOSAVE command.
Bit
0

1
2-15

Definition
Pre-power mode attribute saving capability
If bit = 1, the device will save its Attribute Values prior to going into a power saving mode (Standby or
Sleep mode).
Attribute autosave capability
If bit = 1, the device supports the SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE command.
Reserved (0)

11.42.2.8 Error Logging Capability
Bit
7-1
0

Definition
Reserved (0)
Error Logging support bit
If bit = 1, the device supports the Error Logging

11.42.2.9 Self-test failure check point
This byte indicates the section of self-test where the device detected a failure.

11.42.2.10 Self-test completion time
These bytes are the minimum time in minutes to complete self-test.

11.42.2.11 Data Structure Checksum
The Data Structure Checksum is the 2‟s compliment of the result of a simple 8-bit addition of the first 511 bytes
in the data structure.

Hitachi hard disk drive specifications
213

11.42.3 Device Attribute Thresholds Data Structure
The following defines the 512 bytes that make up the Attribute Threshold information. This data structure is
accessed by the host in its entirety using the SMART Read Attribute Thresholds. All multi-byte fields shown in
these data structures follow the ATA/ATAPI-7 specification for byte ordering, namely that the least significant
byte occupies the lowest numbered byte address location in the field.
The sequence of active Attribute Thresholds will appear in the same order as their corresponding Attribute
Values.
Description

Bytes

Offset

Data Structure Revision Number

Value

00h

02h

…

1 Attribute Threshold
…

0010h

..
th

30 Attribute Threshold

15Eh

Reserved

16Ah

00h

131

17Ch

00h

1FFh

Vendor specific
Data structure checksum

512

Table 153 Device Attribute Thresholds Data Structure

11.42.3.1 Data Structure Revision Number
This value is the same as the value used in the Device Attributes Values Data Structure.

11.42.3.2 Individual Thresholds Data Structure
The following defines the 12 bytes that make up the information for each Threshold entry in the Device Attribute
Thresholds Data Structure. Attribute entries in the Individual Threshold Data Structure are in the same order and
correspond to the entries in the Individual Attribute Data Structure.
Description

Bytes

Offset

Attribute ID Number (01h to FFh)

00h

Attribute Threshold

01h

Reserved (00h)

02h

Total Bytes

Table 154 Individual Threshold Data Structure

11.42.3.3 Attribute ID Numbers
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.

11.42.3.4 Attribute Threshold
These values are preset at the factory and are not meant to be changeable.

11.42.3.5 Data Structure Checksum
The Data Structure Checksum is the 2‟s compliment of the result of a simple 8-bit addition of the first 511 bytes
in the data structure.

Hitachi hard disk drive specifications
214

11.42.4 SMART Log Directory
Table 155 defines the 512 bytes that make up the SMART Log Directory. The SMART Log Directory is SMART
Log Address zero and is defined as one sector long.
Description

Bytes

Offset

SMART Logging Version

00h

Number of sectors in the log at log address 1

02h

Reserved

03h

Number of sectors in the log at log address 2

04h

Reserved

05h

…

Number of sectors in the log at log address 255

1Feh

Reserved

1FFh

…

512

Table 155 SMART Log Directory

The value of the SMART Logging Version word shall be 01h. The logs at log addresses 80-9Fh shall each be
defined as 16 sectors long.

Hitachi hard disk drive specifications
215

11.42.5 SMART summary error log sector
The following defines the 512 bytes that make up the SMART summary error log sector. All multi-byte fields
shown in this data structure follow the ATA/ATAPI-7 specifications for byte ordering.

Description

Bytes

Offset

SMART error log version

00h

Error log index

01h

02h

error log data structure

5Ch

3 error log data structure

B6h

110h

16Ah

1C4h

1C6h

1FFh

1 error log data structure
2

4 error log data structure
5 error log data structure
Device error count
Reserved
Data structure checksum

512

Table 156 SMART summary error log sector

11.42.5.1 SMART error log version
This value is set to 01h.

11.42.5.2 Error log index
This points the most recent error log data structure. Only values 1 through 5 are valid.

11.42.5.3 Device error count
This field contains the total number of errors. The value will not roll over.

Hitachi hard disk drive specifications
216

11.42.5.4 Error log data structure
Data format of each error log structure is shown below.
Description

Bytes

1 error log data structure

Offset
12

00h

error log data structure

0Ch

3 error log data structure

18h

24h

5 error log data structure

30h

Error data structure

3Ch

4 error log data structure

Table 157 Error log data structure

Command data structure: Data format of each command data structure is shown below.
Description

Bytes

Offset

Device Control register

00h

Features register

01h

Sector count register

02h

Sector number register

03h

Cylinder Low register

04h

Cylinder High register

05h

Device/Head register

06h

Command register

07h

Timestamp (milliseconds from Power On)

08h

Table 158 Command data structure

Hitachi hard disk drive specifications
217

Error data structure: Data format of error data structure is shown below.
Description

Bytes

Offset

Reserved

00h

Error register

01h

Sector count register

02h

Sector number register

03h

Cylinder Low register

04h

Cylinder High register

05h

Device/Head register

06h

Status register

07h

08h

State

1Bh

Life timestamp (hours)

1Ch

Extended error data (vendor specific)

Table 159 Error data structure

State field contains a value indicating the device state when command was issued to the device.
Value

State

x0h

Unknown

x1h

Sleep

x2h

Standby

x3h

Active/Idle

x4h

SMART Off-line or Self-test

x5h-xAh

Reserved

xBh-xFh

Vendor specific
Note: The value of x is vendor specific.

Hitachi hard disk drive specifications
218

11.42.6 Self-test log data structure
The following defines the 512 bytes that make up the Self-test log sector. All multi-byte fields shown in these
data structures follow the ATA/ATAPI-7 specifications for byte ordering.
Description

Bytes

Offset

Data structure revision

00h

Self-test number

n*18h+02h

Self-test execution status

n*18h+03h

Life time power on hours

n*18h+04h

Self-test failure check point

n*18h+06h

LBA of first failure

n*18h+07h

n*18h+0Bh

Vendor specific

1Fah

Self-test index

1FCh

Reserved

1FDh

Data structure checksum

1FFh

Vendor specific
…

512
Note: n is 0 through 20

Table 160 Self-test log data structure

The data structure contains the descriptor of Self-test that the device has performed. Each descriptor is 24 bytes
long and the self-test data structure is capable to contain up to 21 descriptors.
After 21 descriptors have been recorded, the oldest descriptor will be overwritten with new descriptor.
Self-test index points the most recent descriptor. When there is no descriptor the value is 0. When there is
descriptor(s) the value is 1 through 21.

Hitachi hard disk drive specifications
219

11.42.7 Selective self-test log data structure
The Selective self-test log is a log that may be both written and read by the host. This log allows the host to
select the parameters for the self-test and to monitor the progress of the self-test. The following table defines the
contents of the Selective self-test log which is 512 bytes long. All multi-byte fields shown in these data structures
follow the ATA/ATAPI-7 specifications for byte ordering.
Description

Bytes

Offset

Read/Write

Data structure revision

00h

R/W

Starting LBA for test span 1

02h

R/W

Ending LBA for test span 1

0Ah

R/W

Starting LBA for test span 2

12h

R/W

Ending LBA for test span 2

1Ah

R/W

Starting LBA for test span 3

22h

R/W

Ending LBA for test span 3

2Ah

R/W

Starting LBA for test span 4

32h

R/W

Ending LBA for test span 4

3Ah

R/W

Starting LBA for test span 5

42h

R/W

4Ah

R/W

Reserved

256

52h

Reserved

Vendor specific

154

152h

Vendor specific

Current LBA under test

1Ech

Read

Current span under test

1F4h

Read

Feature flags

1F6h

R/W

Vendor specific

1F8h

Vendor specific

Selective self-test pending time

1FCh

R/W

Reserved

1Feh

Reserved

Data structure checksum

1FFh

R/W

Ending LBA for test span 5

512

Table 161 Selective self-test log data structure

11.42.7.1 Feature flags
The Feature flags define the features of Selective self-test to be executed.
Bit
0
1
2
3
4
5-15

Description
Vendor specific
When set to one, perform off-line scan after selective test.
Vendor specific
When set to one, off-line scan after selective test is pending.
When set to one, off-line scan after selective test is active.
Reserved.

Table 162 Selective self-test feature flags

Hitachi hard disk drive specifications
220

11.42.8 Error Reporting
The following table shows the values returned in the Status and Error Registers when specific error conditions
are encountered by a device.

Error Condition

Status Register

Error
Register

A SMART FUNCTION SET command was received by the device without the
required key being loaded into the Cylinder High and Cylinder Low registers.

51h

04h

A SMART FUNCTION SET command was received by the device with a
subcommand value in the Features Register that is either invalid or not
supported by this device.

51h

04h

A SMART FUNCTION SET command subcommand other than SMART
ENABLE OPERATIONS was received by the device while the device was in a
“SMART disabled” state.

51h

04h

The device is unable to read its Attribute Values or Attribute Thresholds data
structure.

51h

10h or 40h

The device is unable to write to its Attribute Values data structure.

51h

10h or 01h

Table 163 SMART Error Codes

Hitachi hard disk drive specifications
221

11.43 Standby (E2h/96h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 164 Standby Command (E2h/96h)
The Standby command causes the device to enter the Standby Mode immediately, and set auto power down
timeout parameter (standby timer).
When the Standby mode is entered, the drive is spun down but the interface remains active. If the drive is
already spun down, the spin down sequence is not executed.
During the Standby mode the device will respond to commands, but there is a delay while waiting for the spindle
to reach operating speed.
The automatic power down sequence is enabled and the timer starts counting down when the drive returns to
Idle mode.
Output Parameters To The Device
Sector Count
Timeout Parameter. If zero, the timeout interval (Standby Timer) is NOT disabled. If
non-zero, then the automatic power down sequence is enabled, and the timeout
interval is shown blow:

Hitachi hard disk drive specifications
222

Value
Timeout
-----------------------------------------0
Timer disabled
1-240
Value * 5
seconds
241-251
(Value-240) * 30 minutes
252
21 minutes
253
8 hours
254
21 minutes 10 seconds
255
21 minutes 15 seconds
When the automatic power down sequence is enabled, the drive will enter Standby
mode automatically if the timeout interval expires with no drive access from the host.
The timeout interval will be reinitialized if there is a drive access before the timeout
interval expires.

Hitachi hard disk drive specifications
223

11.44 Standby Immediate (E0h/94h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

IDN

Status Register
2

ABT T0N
V

0
AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 165 Standby Immediate Command (E0h/94h)
The Standby Immediate command causes the device to enter Standby mode immediately.
The device is spun down but the interface remains active. If the device is already spun down, the spin down
sequence is not executed.
During the Standby mode, the device will respond to commands, but there is a delay while waiting for the spindle
to reach operating speed.
The Standby Immediate command will not affect the auto power down timeout parameter.

Hitachi hard disk drive specifications
224

11.45 Write Buffer (E8h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY

RDY

DSC DRQ COR
-

IDX

ERR

Table 166 Write Buffer Command (E8h)
The Write Buffer command transfers a sector of data from the host to the sector buffer of the device. The sectors
of data are transferred through the Data Register 16 bits at a time.
The Read Buffer and Write Buffer commands are synchronized such that sequential Write Buffer and Read
Buffer commands access the same 512 byte within the buffer.

Hitachi hard disk drive specifications
225

11.46 Write DMA (Cah/CBh)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

…See Below…

Error Register
7

CRC UNC
V

IDN

Status Register
2

ABT T0N AMN
V

BSY RDY
0

5
DF
0

DSC DRQ COR IDX ERR
V

Table 167 Write DMA Command (Cah/CBh)
The Write DMA command transfers one or more sectors of data from the host to the device, then the data is
written to the disk media.
The sectors of data are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ
and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate
that data transfer has terminated and status is available.
If an uncorrectable error occurs, the write will be terminated at the failing sector.

Hitachi hard disk drive specifications
226

Output Parameters To The Device
Sector Count

The number of continuous sectors to be transferred.
sectors will be transferred.

Sector Number

The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 – 7. (L=1)

Cylinder High/Low

The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 – 15 (Low), 16 – 23 (High). (L=1)

The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 – 27. (L=1)

The retry bit, but this bit is ignored.

If zero is specified, then 256

Input Parameters From The Device
Sector Count

The number of requested sectors not transferred.
unrecoverable error occurs.

Sector Number

The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 – 7. (L=1)

Cylinder High/Low

The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 – 15 (Low), 16 – 23 (High).
(L=1)

The head number of the last transferred sector. (L=0) In LBA mode, this register
contains current LBA bits 24 – 27. (L=1)

Hitachi hard disk drive specifications
227

This will be zero, unless an

11.47 Write DMA FUA Ext (3Dh)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 168 Write DMA FUA Ext Command (3Dh)
The Write DMA FUA Ext command transfers one or more sectors of data from the host to the device, and then
the data is written to the disk media. This command provides the same function as the Write DMA Ext
command except that the transferred data shall be written to the media before the ending status for this
command is reported also when write caching is enabled.
The sectors of data are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ
and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate
that data transfer has terminated and status is available.
If an unrecoverable error occurs, the write will be terminated at the failing sector.

Hitachi hard disk drive specifications
228

Output Parameters To The Device
Sector Count Current

The number of continuous sectors to be transferred low order, bits (7:0).

Sector Count Previous

The number of continuous sectors to be transferred high order bits (15:8). If
zero is specified in the Sector Count register, then 65,536 sectors will be
transferred.

Sector Number Current

LBA (7:0).

Sector Number Previous

LBA (31:24).

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).
Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the first unrecoverable error.

Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
229

11.48 Write DMA Ext (35h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 169 Write DMA Ext Command (35h)
The Write DMA Ext command transfers one or more sectors of data from the host to the device, and then the
data is written to the disk media.
The sectors of data are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ
and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate
that data transfer has terminated and status is available.
If an uncorrectable error occurs, the write will be terminated at the failing sector

Hitachi hard disk drive specifications
230

Output Parameters To The Device
Sector Count Current

The number of continuous sectors to be transferred low order, bits (7:0).

Sector Count Previous

The number of continuous sectors to be transferred high order bits (15:8). If
zero is specified in the Sector Count register, then 65,536 sectors will be
transferred.

Sector Number Current

LBA (7:0).

Sector Number Previous

LBA (31:24).

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).
Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the first unrecoverable error.

Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
231

11.49 Write FPDMA Queued (61h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

…See Below…

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 170 Write FPDMA Queued Command (61h)
The Write FPDMA Queued command transfers one or more sectors of data from the host to the device, and then
the data is written to the disk media.
If an unrecoverable error occurs, the write will be terminated at the failing sector

Hitachi hard disk drive specifications
232

LBA (31:24)

Cylinder Low Current

LBA (15:8)

Cylinder Low Previous

LBA (39:32)

Cylinder High Current

LBA (23:16)

Cylinder High Previous

LBA (47:40)

Device/Head
FUA (bit 7)

When the FUA bit is set to 1, the completion status is indicated after the
transferred data are written to the media also when Write Cache is enabled.
When the FUA bit is set to 0, the completion status may be indicated before the
transferred data are written to the media successfully when Write Cache is
enabled.

Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)

LBA (31:24)of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8)of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32)of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16)of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40)of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
233

11.50 Write Log Ext (3Fh)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Feature

Sector Count

Sector Number

Cylinder Low

Cylinder High

…See Below…

Sector Count

Sector Number

Cylinder Low

Cylinder High

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Device/Head

Command

Status

…See Below…

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 171 Write Log Ext Command (3Fh)
This command writes a specified number of 512 byte data sectors to the specific log. The device shall interrupt
for each DRQ block transferred.

Hitachi hard disk drive specifications
234

Output Parameters To The Device
Sector Count Current

The number of sectors to be written to the specified log low order, bits (7:0).

Sector Count Previous

The number of sectors to be written to the specified log high orders, bits (15:8). If
the number of sectors is greater than the number indicated in the Log directory,
which is available in Log number zero, the device shall return command aborted.
The log transferred to the device shall be stored by the device starting at the first
sector in the specified log.

Sector Number Current

The log to be written as described in 0 Log address definition. If the host
attempts to write to a read only log address, the device shall return command
aborted.

Cylinder Low Current

The first sector of the log to be written low order, bits (7:0).

Cylinder Low Previous

The first sector of the log to be written high order, bits (15:8).

If the feature set associated with the log specified in the Sector Number register is not supported or enabled, or if
the values in the Sector Count, Sector Number or Cylinder Low registers are invalid, the device shall return
command aborted. If the host attempts to write to a read only log address, the device shall return command
aborted.

Hitachi hard disk drive specifications
235

11.51 Write Multiple (C5h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF
0

DSC DRQ COR
V

IDX

ERR

Table 172 Write Multiple Command (C5h)

The Write Multiple command transfers one or more sectors from the host to the device, and then the data is
written to the disk media.
Command execution is identical to the Write Sector(s) command except that an interrupt is generated for each
block (as defined by the Set Multiple command) instead of for each sector. The sectors are transferred through
the Data Register 16 bits at a time.

Hitachi hard disk drive specifications
236

Output Parameters To The Device
Sector Count

The number of continuous sectors to be transferred.
sectors will be transferred.

Sector Number

The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 - 7. (L=1)

Cylinder High/Low

The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)

The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 - 27. (L=1)

If zero is specified, then 256

Input Parameters From The Device
Sector Count

The number of requested sectors not transferred.
unrecoverable error occurs.

Sector Number

The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 - 7. (L=1)

Cylinder High/Low

The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)

The head number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 24 - 27. (L=1)

Hitachi hard disk drive specifications
237

This will be zero, unless an

11.52 Write Multiple Ext (39h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

...See Below...

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 173 Write Multiple Ext Command (39h)

The Write Multiple Ext command transfers one or more sectors from the host to the device, and then the data is
written to the disk media.
Command execution is identical to the Write Sector(s) Ext command except that an interrupt is generated for
each block (as defined by the Set Multiple command) instead of for each sector. The sectors are transferred
through the Data Register 16 bits at a time.

Hitachi hard disk drive specifications
238

Output Parameters To The Device
Sector Count Current

The number of continuous sectors to be transferred low order, bits (7:0)

Sector Count Previous

The number of continuous sectors to be transferred high order, bits (15:8).
zero is specified in the Sector Count register, then 65,536 sectors shall be
transferred.

Sector Number Current

LBA (7:0).

Sector Number Previous

LBA (31:24).

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the first unrecoverable error.

Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
239

11.53 Write Multiple FUA Ext (CEh)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

...See Below...

Feature

Sector Count

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Sector Number

Sector Number
Previous

Current

Cylinder Low

Cylinder Low
Previous

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 174 Write Multiple FUA Ext Command (CEh)

The Write Multiple Ext command transfers one or more sectors from the host to the device, and then the data is
written to the disk media. This command provides the same function as the Write Multiple Ext command
except that the transferred data shall be written to the media before the ending status for this command is
reported also when write caching is enabled.
Command execution is identical to the Write Sector(s) Ext command except that an interrupt is generated for
each block (as defined by the Set Multiple command) instead of for each sector. The sectors are transferred
through the Data Register 16 bits at a time.

Hitachi hard disk drive specifications
240

Output Parameters To The Device
Sector Count Current

The number of continuous sectors to be transferred low order, bits (7:0)

Sector Count Previous

The number of continuous sectors to be transferred high order, bits (15:8).
zero is specified in the Sector Count register, then 65,536 sectors shall be
transferred.

Sector Number Current

LBA (7:0).

Sector Number Previous

LBA (31:24).

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the first unrecoverable error.

Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
241

11.54 Write Sector(s) (30h/31h)
Command Block Output Registers

Command Block Input Registers

Data

Feature

Error

Sector Count

Sector Number

Cylinder Low

Cylinder High

Device/Head

Command

Status

...See Below...

Error Register
7

CRC UNC
0

Status Register

IDN

ABT

T0N AMN
0

BSY RDY
0

5
DF

DSC DRQ COR IDX
V

0
ERR
V

Table 175 Write Sector(s) Command (30h/31h)
The Write Sector(s) command transfers one or more sectors from the host to the device,and then the data is
written to the disk media.
The sectors are transferred through the Data Register 16 bits at a time.
If an uncorrectable error occurs, the write will be terminated at the failing sector.

Hitachi hard disk drive specifications
242

Output Parameters To The Device
Sector Count

The number of continuous sectors to be transferred.
sectors will be transferred.

Sector Number

The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 - 7. (L=1)

Cylinder High/Low

The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)

The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 - 27. (L=1)

R
The retry bit, but this bit is ignored.
Input Parameters From The Device
Sector Count
The number of requested sectors not transferred.
unrecoverable error occurs.

If zero is specified, then 256

This will be zero, unless an

Sector Number

The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 - 7. (L=1)

Cylinder High/Low

The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High).
(L=1)

The head number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 24 - 27. (L=1)

Hitachi hard disk drive specifications
243

11.55 Write Sector(s) Ext (34h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

...See Below...

Feature

Sector Count
Sector
Number

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

Sector Count
Previous

Current

Cylinder Low

Sector
Number
Cylinder Low

Current

Cylinder High

Cylinder High
Previous

Device/Head

Command

Status

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 176 Write Sector(s) Ext Command (34h)
The Write Sector(s) Ext command transfers one or more sectors from the host to the device, and then the data is
written to the disk media.
The sectors are transferred through the Data Register 16 bits at a time.
If an uncorrectable error occurs, the write will be terminated at the failing sector.

Hitachi hard disk drive specifications
244

Output Parameters To The Device
Sector Count Current
The number of continuous sectors to be transferred low order, bits (7:0).
Sector Count Previous

The number of continuous sectors to be transferred high order bits (15:8). If zero
is specified, then 65,536 sectors will be transferred.

Sector Number Current
LBA (7:0).
Sector Number Previous
LBA (31:24).
Cylinder Low Current
LBA (15:8).
Cylinder Low Previous
LBA (39:32).
Cylinder High Current
LBA (23:16).
Cylinder High Previous
LBA (47:40).
Input Parameters From The Device
Sector Number (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
Sector Number (HOB=1)
LBA (31:24) of the address of the first unrecoverable error.
Cylinder Low (HOB=0)
LBA (15:8) of the address of the first unrecoverable error.
Cylinder Low (HOB=1)
LBA (39:32) of the address of the first unrecoverable error.
Cylinder High (HOB=0)
LBA (23:16) of the address of the first unrecoverable error.
Cylinder High (HOB=1)
LBA (47:40) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
245

11.56 Write Stream DMA (3Ah)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High
Feature
Sector Count
Sector
Number
Cylinder Low
Cylinder High

Data High

Current

Error

Current

...See Below...

Sector Count
Sector
Number
Cylinder Low
Cylinder High

Device/Head

Command

Status

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

CCTO

BSY

RDY

DWE DRQ
0

COR

IDX

ERR

Table 177 Write Stream DMA Command (3Ah)

The Write Stream DMA command allows the host to write data using the DMA data transfer protocol. This
command allows for the host to specify to the device that additional actions need to be performed prior to the
completion of the command if the required bits are set.
If the Write Continuous bit is set to one, the device shall not stop execution of the command due to errors. If
the WC bit is set to one and errors occur in the transfer or writing of the data, the device shall continue to transfer
the amount of data requested and then provide ending status with the BSY bit cleared to zero, the SE bit set to
one, the ERR bit cleared to zero, and the type of error, ICRC, IDNF, or ABRT, reported in the error log. If the
WC bit is set to one and the Command Completion Time Limit expires, the device shall stop execution of the
command and provide ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to
zero, and report the fact that the Command Completion Time Limit expired by setting the CCTO bit in the error
log to one, In all cases, the device shall attempt to transfer the amount of data requested within the Command
Completion Time Limit event if some data transferred is in error.

Hitachi hard disk drive specifications
246

Output Parameters To The Device
Feature Current
URG (bit7)

(bit6)

F (bit5)
HSE (bit4)

Stream ID (bit 0..2)
Feature Previous
CCTL (7:0)

Sector Count Current
Sector Count Previous

Stream ID specifies the stream being written. The device shall operate
according to the Stream ID set by the Write Stream command.
The time allowed for the current command's completion is calculated as follows:
Command Completion Time Limit = (content of the Feature register
Previous) * (Identify Device words (99:98)) useconds
If the value is zero, the device shall use the Default CCTL supplied with a previous
Configure Stream command for this Stream ID. If the Default CCTL is zero, or
no previous Configure Stream command was defined for this Stream ID, the
device will ignore the CCTL. The time is measured from the write of the
command register to the final INTRQ for command completion. The device has
minimum CCTL value. When the specified value is shorter than the minimum
value, CCTL is set to the minimum value. Actual minimum CCTL value is
described in the “Deviations from Standard” section.
The number of continuous sectors to be transferred low order, bits (7:0)

Sector Number Current

The number of continuous sectors to be transferred high order, bits (15:8). If
zero is specified in the Sector Count register, then 65,536 sectors will be
transferred.
LBA (7:0).

Sector Number Previous

LBA (31:24).

Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).

Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the first unrecoverable error.

Hitachi hard disk drive specifications
247

Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

CCTO (Error, bit 0)

CCTO bit shall be set to one if a Command Completion Time Limit Out error has
occurred.

Hitachi hard disk drive specifications
248

11.57 Write Stream PIO (3Bh)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Feature
Sector Count
Sector
Number

Cylinder Low
Cylinder High

Current

...See Below...

Sector Count
Sector
Number
Cylinder Low
Cylinder High

Device/Head

Command

Status

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

CCTO

BSY

RDY

DWE DRQ
0

COR

IDX

ERR

Table 178 Write Stream PIO Command (3Bh)

This command writes from 1 to 65536 sectors as specified in the Sector Count register.
requests 65536 sectors.

A sector count of 0

If the Write Continuous bit is set to one, the device shall not stop execution of the command due to errors. If
the WC bit is set to one and errors occur in the transfer or writing of the data, the device shall continue to transfer
the amount of data requested and then provide ending status with the BSY bit cleared to zero, the SE bit set to
one, the ERR bit cleared to zero, and the type of error, IDNF, or ABRT, reported in the error log. If the WC bit is
set to one and the Command Completion Time Limit expires, the device shall stop execution of the command
and provide ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to zero, and
report the fact that the Command Completion Time Limit expired by setting the CCTO bit in the error log to one,
In all cases, the device shall attempt to transfer the amount of data requested within the Command Completion
Time Limit event if some data transferred is in error.

Hitachi hard disk drive specifications
249

Output Parameters To The Device
Feature Current
URG (bit7)

WC specifies Write Continuous mode enabled. If the Write Continuous bit is
set to one, the device shall not stop execution of the command due to errors.
If the WC bit is set to one and errors occur in transfer or writing of the data, the
device shall continue to transfer the amount of data requested and then provide
ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit
cleared to zero, and the type of error, IDNF or ABRT reported in the error log.
If the WC bit is set to one and the Command Completion Time Limit expires, the
device shall stop execution of the command and provide ending status with the
BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to zero, and
report the fact that the Command Completion Time Limit expired by setting the
CCTO bit in the error log to one.
In all cases, the device shall attempt to transfer the amount of data requested
within the Command Completion Time Limit even if some data transferred is in
error.
F specifies that all data for the specified stream shall be flushed to the media
before command complete is reported when set to one.
HSE (Handle Stream Error) specifies that this command starts at the LBA of the
last reported error for this stream, so the device may attempt to continue its
corresponding error recovery sequence where it left off earlier.
Stream ID specifies the stream being written. The device shall operate
according to the Stream ID set by the Write Stream command.
The time allowed for the current command's completion is calculated as follows:
Command Completion Time Limit = (content of the Feature register
Previous) * (Identify Device words (99:98)) useconds
If the value is zero, the device shall use the Default CCTL supplied with a
previous Configure Stream command for this Stream ID. If the Default CCTL
is zero, or no previous Configure Stream command was defined for this Stream
ID, the device will ignore the CCTL. The time is measured from the write of the
command register to the final INTRQ for command completion. The device has
minimum CCTL value. When the specified value is shorter than the minimum
value, CCTL is set to the minimum value. Actual minimum CCTL value is
described in the “Deviations from Standard” section.
The number of continuous sectors to be transferred low order, bits (7:0)

(bit6)

F (bit5)
HSE (bit4)

Stream ID (bit 0..2)
Feature Previous

Sector Count Current
Sector Count Previous

Sector Number Current

The number of continuous sectors to be transferred high order, bits (15:8). If
zero is specified in the Sector Count register, then 65,536 sectors will be
transferred.
LBA (7:0).

Sector Number Previous LBA (31:24).
Cylinder Low Current

LBA (15:8).

Cylinder Low Previous

LBA (39:32).

Cylinder High Current

LBA (23:16).

Cylinder High Previous

LBA (47:40).

Hitachi hard disk drive specifications
250

Input Parameters From The Device
Sector Number (HOB=0)

LBA (7:0) of the address of the first unrecoverable error.

Sector Number (HOB=1)

LBA (31:24) of the address of the first unrecoverable error.

Cylinder Low (HOB=0)

LBA (15:8) of the address of the first unrecoverable error.

Cylinder Low (HOB=1)

LBA (39:32) of the address of the first unrecoverable error.

Cylinder High (HOB=0)

LBA (23:16) of the address of the first unrecoverable error.

Cylinder High (HOB=1)

LBA (47:40) of the address of the first unrecoverable error.

CCTO (Error, bit 0)

CCTO bit shall be set to one if a Command Completion Time Limit Out error has
occurred.

Hitachi hard disk drive specifications
251

11.58 Write Uncorrectable Ext (45h)
Command Block Output Registers

Command Block Input Registers

Data Low

Data High

Current

Error

Current

Feature
Sector Count
Sector
Number

Cylinder Low
Cylinder High

Current

Device/Head

Command

...See Below...

Sector Count
Sector
Number
Cylinder Low
Cylinder High

Device/Head

Status

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

HOB=0

HOB=1

...See Below...

Error Register

Status Register

CRC

UNC

IDN

ABT

T0N

AMN

BSY

RDY

DSC

DRQ

COR

IDX

ERR

Table 179 Write Uncorrectable Ext Command (45h)
The Write Uncorrectable Ext command is used to cause the device to report an uncorrectable error when the
target sector is subsequently read.
When the Feature field contains a value of 55h the Write Uncorrectable Ext command shall cause the device to
indicate a failure when reads to any of the sectors that are contained in physical block of specified sector are
performed. These sectors are referred to as „pseudo uncorrectable‟ sectors. In this case whenever a pseudo
uncorrectable sector is accessed via a read command the drive shall perform normal error recovery to the fullest
extent and then set the UNC and ERR bits to indicate the sector is bad.
When the Feature field(7:0) contains a value of AAh the Write uncorrectable ext command shall cause the
device to flag the specified sector as „flagged uncorrectable‟. Flagging a logical sector as uncorrectable shall
cause the device to indicate a failure when reads to the specified sector are performed. These sectors are
referred to as „flagged uncorrectable‟ sectors. In this case whenever a „flagged uncorrectable‟ sector is accessed
via a read command the device shall set the UNC and ERR bits to indicate the sector is bad.
If this command is sent to the device with the content of the Features field(7:0) set to anything other than what is
defined above the device shall abort the command.
Commands that return UNC and ERR when a pseudo uncorrectable or flagged uncorrectable sector is read
include: READ DMA,READ DMA EXT, READ MULTIPLE, READ MULTIPLE EXT, READ SECTOR(S), READ
SECTOR(S) EXT, READ VERIFY SECTOR(S), READ, VERIFY SECTOR(S) EXT, READ STREAM EXT, READ
STREAM DMA EXT. if the host writes to a „pseudo uncorrectable‟ or „flagged uncorrectable‟ sector, the drive
shall attempt to write the data to the sector. The write shall clear the uncorrectable status of the sector and make
the sector good if possible and the device shall verify that the sector may now be read without error. It is possible
that an „uncorrectable‟ sector location has actual physical errors. In this case read commands and/or write
commands shall return ERR status information that is consistent with the error. The pseudo uncorrectable or

Hitachi hard disk drive specifications
252

flagged uncorrectable status of a sector shall remain through a power cycle. If the drive is unable to process a
Write Uncorrectable EXT command for any reason the device shall abort the command.

Output Parameters To The Device
Feature Current
Uncorrectable options
55h :Create a pseudo-uncorrectable error with logging
AAh :Created a flagged error without logging
Other value : Reserved
Sector Count Current

The number of continuous sectors to be transferred low order, bits (7:0).

Sector Count Previous

The number of continuous sectors to be transferred high order bits (15:8). If zero
is specified, then 65,536 sectors will be transferred.

Sector Number Current
Sector Number Previous
Cylinder Low Current
Cylinder Low Previous
Cylinder High Current
Cylinder High Previous

LBA (7:0).
LBA (31:24).
LBA (15:8).
LBA (39:32).
LBA (23:16).
LBA (47:40).

Hitachi hard disk drive specifications
253

Timings

The timing of BSY and DRQ in Status Register are shown in Table 180Table 181.
The other timings are described in HDS7210xxCLA3yz / HUA7220xxCLA33z / HCS5C10xxCLA382 /
HCS7210xxCLA3y2 / HDS5C10xxCLA382 Final Functional Specification.
FUNCTION

INTERVAL

START

Power On
and
COMRESET

Device Busy after Power On

Software
Reset

Device Busy after Software
Reset

Device Ready after
Software Reset

COMRESET

Device
Ready
COMRESET

after

Non-Data
command

Device Busy after a Register
FIS to issue a command
A Register FIS to report
Command Complete

PIO Data In
command

PIO Data
Out
Command

Device Busy after a Register
FIS to issue a command

STOP

TIMEOUT

Power On

The device sets BSY(=0) and
RDY(=1) to the Status
Register and sends a Register
FIS to the host.

31 sec

The host asserts SRST(=1)
in the Device Control
Register and sends a
Register FIS to the Device.
The host asserts SRST(=1)
to the Device Control
Register and sends a
Register FIS to the Device.
Then the host negates
SRST(=0) to the Device
Control Register and sends a
Register FIS to the Device.
COMRESET Signal asserted

The Host sets BSY(=1) to the
Status Register.

400 ns

The device sets BSY(=0) and
RDY(=1) to the Status
Register and requests to send
a Register FIS to the host.

31 sec

The device sets BSY(=0) and
RDY(=1)
to
the
Status
Register and sends a Register
FIS to the Host.
The host sets BSY(=1) to the
Status register

31 sec

The host sets proper values
in the registers and sends a
Register FIS
The host sets BSY(=1) to the
Status Register

The device sets the status of
the command to the Status
Register and sends a Register
FIS to the host
The host sets BSY(=1) to the
Status Register

400 ns

30 sec

PIO SETUP FIS for data-in
transfer

The host sets proper values
in the registers and sends a
Register FIS
The host sets BSY(=1) to the
Status Register

Device Busy after data-in
transfer

A PIO SETUP FIS is
transferred to the host.

Device Busy after a Register
FIS to issue a command

The host sets BSY(=1) to the
Status Register

400 ns

Device Busy after data-out
transfer

The host sets proper values
in the registers and sends a
Register FIS
The host sends a Data FIS to
the device.

The host sets BSY(=1) to the
Status Register

400 ns

PIO SETUP FIS for data-out
transfer

The host sets BSY(=1) to the
Status Register

The device sets BSY(=0) and
DRQ(=1) to the Status
Register and sends a PIO
SETUP FIS to the host.

30 sec

The device sets BSY(=0) and
DRQ(=1) to the Status
Register and sends a PIO
SETUP FIS to the host.
The host sets BSY(=1) to the
Status Register

Table 180 Timeout Values

Hitachi hard disk drive specifications
254

400 ns

30 sec

400 ns

FUNCTION
DMA Data
Transfer
Command

INTERVAL

START

Device Busy after a
Register FIS to issue a
command

The hosts sets proper
values in the registers and
sends a Register FIS

STOP
The host sets BSY(=1) to
the Status Register.

TIMEOUT
400 ns

Table 181 Timeout Values --Continued-Command category is referred to 10, "Command Protocol" on page 100.
The abbreviations "ns", "us", "ms" and "sec" mean nanoseconds, microseconds, milliseconds and seconds,
respectively.
We recommend that the host system executes Soft reset and then retries to issue the command if the host
system timeout would occur for the device.

Hitachi hard disk drive specifications
255

Index
Security Erase Unit (F4h) ........................................ 181
Security Freeze Lock (F5h) ...................................... 183
Security Set Password (F1h) .................................... 184
Security Unlock (F2h) .............................................. 186
Seek (7xh) ......................................................... 188, 189
Set Features (Efh) .................................................... 190
Set Max (F9h)
Set Max Freeze Lock (Feature = 04h) ................. 199
Set Max Lock (Feature = 02h) ............................. 197
Set Max Set Password (Feature = 01h) ............... 196
Set Max Unlock (Feature = 03h) ......................... 198
Set Max Address (F9h) ............................................. 194
Set Max Address Ext (37h)....................................... 200
Set Multiple (C6h) .................................................... 202
Sleep (E6h/99h) ........................................................ 203
SMART Function Set (B0h) ..................................... 204
Standby (E2h/96h) .................................................... 222
Standby Immediate (E0h/94h) ................................. 224
Write Buffer (E8h) .................................................... 225
Write DMA (Cah/CBh).............................................. 226
Write DMA Ext (35h)................................................ 230
Write DMA FUA Ext (3Dh) ...................................... 228
Write FPDMA Queued (61h) .................................... 232
Write Log Ext (3Fh) .................................................. 234
Write Multiple (C5h) ................................................ 236
Write Multiple Ext (39h) .......................................... 238
Write Multiple FUA Ext (CEh) ................................ 240
Write Sector(s) (30h/31h) ......................................... 242
Write Sector(s) Ext (34h) .......................................... 244
Write Stream DMA (3Ah) ......................................... 246
Write Stream PIO (3Bh) ................................... 249, 252
Command Protocol........................................................ 100
COMRESET ..................................................................... 54
COR ................................................................................. 53
CORR .............................................................................. 53
CRC ................................................................................. 51

4
48-bit Address Feature ................................................... 72

A
ABRT ................................................................................ 51
ABT .................................................................................. 51
Advanced Power Management feature .......................... 71
AMN ................................................................................. 51
AMNF ............................................................................... 51
APM ................................................................................. 71
Auto Reassign Function.................................................. 70
Non recovered read errors ........................................... 70
Non recovered write errors ........................................... 70
Recovered read errors ................................................. 70

B
BSY .................................................................................. 53

C
Command
Check Power Mode (E5h/98h) .................................. 107
Configure Stream (51h) ............................................ 108
Device Configuration Overlay (B1h) ........................ 110
Download Microcode (92h) ....................................... 114
Execute Device Diagnostic (90h) .............................. 116
Flush Cache (E7h) .................................................... 117
Flush Cache Ext (EAh) ............................................. 118
Format Track (50h) ................................................... 119
Format Unit (F7h) .................................................... 121
Identify Device (ECh) ............................................... 122
Idle (E3h/97h) ........................................................... 133
Idle Immediate (E1h/95h) ........................................ 135
Initialize Device Parameters (91h) .......................... 136
Read Buffer (E4h) ..................................................... 137
Read DMA Ext (25h) ................................................. 140
Read DMA(C8h/C9h) ................................................ 138
Read FPDMA Queued (60h) ..................................... 142
Read Log Ext (2Fh) ................................................... 144
Read Multiple (C4h) ................................................. 157
Read Multiple Ext (29h) ........................................... 158
Read Native Max Address (F8h) .............................. 160
Read Native Max Address Ext (27h) ........................ 161
Read Sector(s) (20h/21h)........................................... 163
Read Sector(s) Ext (24h) ........................................... 165
Read Stream DMA (2Ah) .......................................... 167
Read Stream PIO (2Bh) ............................................ 170
Read Verify Sector(s) (40h/41h) ................................ 173
Read Verify Sector(s) Ext (42h) ................................ 175
Recalibrate (1xh) ....................................................... 177
Security Disable Password (F6h) ............................. 178
Security Erase Prepare (F3h)................................... 180

D
DF .................................................................................... 53
Diagnostic and Reset considerations ............................. 55
DMA Data In commands .............................................. 102
DMA Data Out commands ........................................... 102
DRDY ............................................................................... 53
DRQ ................................................................................. 53
DRV ................................................................................. 50
DS0 .................................................................................. 50
DS1 .................................................................................. 50
DSC ................................................................................. 53

E
ERR ................................................................................. 53

F
First-party DMA commands......................................... 102
Flush to Disk bit ............................................................. 74

256

Reassign Function .......................................................... 70
Register
Alternate Status Register .......................................... 48
Command register ...................................................... 48
Cylinder High Register .............................................. 48
Cylinder Low Register ................................................ 49
Data Register .............................................................. 49
Device Control Register.............................................. 49
Device/Head Register ................................................. 50
Drive Address Register............................................... 50
Error Register ............................................................. 51
Features Register ....................................................... 52
Sector Count Register ................................................ 52
Sector Number Register ............................................. 52
Status Register ........................................................... 53
Register Initialization .................................................... 55
RST .................................................................................. 49

H
H0 ..................................................................................... 50
H1 ..................................................................................... 50
H2 ..................................................................................... 50
H3 ..................................................................................... 50
Handle Streaming Error bit ........................................... 74
HOB.................................................................................. 49
Host Protected Area Feature .......................................... 67
HS0 .................................................................................. 50
HS1 .................................................................................. 50
HS2 .................................................................................. 50
HS3 .................................................................................. 50

I
ICRCE .............................................................................. 51
IDN ................................................................................... 51
IDNF ................................................................................. 51
IDX ................................................................................... 53
IEN ................................................................................... 49
Interface Capability for Power Modes............................ 58

S
Sector Addressing Mode ................................................. 56
Security Mode Feature Set............................................. 61
SERV ............................................................................... 53
Set Max ADDRESS .......................................................... 67
SMART Function ............................................................ 59
Attribute thresholds ................................................... 59
Attribute values .......................................................... 59
Attributes .................................................................... 59
Error Log..................................................................... 60
Off-line Read Scanning .............................................. 60
Self-test ....................................................................... 60
SMART commands ..................................................... 59
Threshold exceeded condition .................................... 59
Soft Reset ........................................................................ 54
Software Reset................................................................. 54
SRST ............................................................................... 49
SRV.................................................................................. 53
Standby timer ................................................................. 57
Streaming feature Set ............................ 73, 75, 76, 77, 81
Streaming Logs ............................................................... 74

L
L 50
LBA Addressing Mode..................................................... 56
Logical CHS Addressing Mode ....................................... 56

M
Master Password .............................................................. 62

N
Non-Data commands .................................................... 101
Not Sequential bit ........................................................... 74

T0N .................................................................................. 51
TK0NF .............................................................................. 51

Password ......................................................................... 62
PIO Data In commands ................................................ 100
PIO Data Out commands.............................................. 101
POR.................................................................................. 54
Power Management Commands ..................................... 57
Power Management Feature .......................................... 57
Power Mode ..................................................................... 57
Power On Reset ............................................................... 54

U
UNC ................................................................................. 51
Urgent bit ............................................................ 74, 81, 82
User Password ................................................................. 62

RDY .................................................................................. 53
Read Continuous bit ....................................................... 74
Read Native Max ADDRESS ............................................ 67

Write Cache Function ..................................................... 69
Write Continuous bit ...................................................... 74
WTG................................................................................. 50

257

258

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 258
Language                        : en-US
Title                           : Saturn OEM manual
Author                          : masatoshi.ishikawa
Creator                         : Microsoft® Office Word 2007
Create Date                     : 2011:07:01 15:00:18
Modify Date                     : 2011:07:01 15:00:18
Producer                        : Microsoft® Office Word 2007

EXIF Metadata provided by EXIF.tools

Hitachi HDP725050GLA360 Saturn OEM Manual User To The 7a0cdc68 105a 4432 Aad1 1dd9763bd50b

Navigation menu

Versions of this User Manual:

Views

Navigation