795x B_796x B_Drive_ERS_Dec87 B 796x Drive ERS Dec87

User Manual: 795xB_796xB_Drive_ERS_Dec87

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DOCUMENT INFORMATION
This page provides a sequential record of changes for a ~ulti-page drawing.
Each "Revision Description" shall also include the appropriate page I'1UJIlber(s).
The change on the numbered page(s) shall be indicated with the new revision
letter located in the right hand ~argin of the paragraph that has chanied.
(The tern "Extensive Changes" Ray be entered if the loss of history is
acceptable). All pages of this drawing shall carry the saJlle revision letter as
shown on this page.
Title:
Written By:
Hodel:

795XB DISC DRIVE ERS
MIKE WAITE
7951B / 7958B / 7959B

Part NUJIlbers:
SUpersedes:
Doc. Users:

( R8soSXT
ER:48 D/H: c6. H5

1

A-59S9-1468-1

)

~~

REVISION HISTORY
Rev

~:iWi

Date

Revision Description

Approved by: (name)

MF

AS ISSUED PER co483042 (REV. A=REV .9)

..

)
...
...
.. .
0

REV.

•• :

A

DATE
THIS
ISSUE

12/4/87

DUG.
NO

A-5959-1468-1

PAGE

1

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DISC DRIVE ERS FOR
MODEL NUM8ERS

79578

79598

·79588

TABLE OF CONTENTS
1.0 PURPOSE AND SCOPE
2.0 RELATED DOCUMENTS

PAGE

..·················
..·················

3

4

3.0 GENERAL DESCRIPTION

················

5

4.0 PHYSICAL CHARACTERISTICS

················

8

. . . . • . . . . . • • . .

9

5.0 PRODUCT CAPABILITIES

6.0 ENVIRONMENTAL SPECIFICATIONS . • • . • • . • . . . . • . 10
7.0 POWER SPECIFICATIONS . • • . . • • • . . . . . . . . . . 13
8.0 INTERFACE SPECIFICATIONS

• 15

9.0 RELIABILITY .•

• 17

10.0 SERVICEABILITY.

· · . . . . . . . . . . . . . . . 19

11.0 REGULATORY COMPLIANCE

· .. . . . . . . . . . . 21

12.0 OPERATOR CONTROLS AND INDICATORS • • • • • • • • • • • • 22

A
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DATE
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ISSUE

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1.0 PURPOSE AND SCOPE

1.1 PURPOSE

This document defines all product specifications and operating
characteristics that may be offered on a warranted basis in 7957B, 7958B, and
7959B disc drives.

1.2 SCOPE

In addition to product capabilities, this document describes all mechanical,
electrical, environmental, and reliability specifications for the top level
product. It does not cover specifications for individual sub-assemblies.
Sub-assembly IMS documents should be consulted for such details.
Also, this document does not cover specifics of the cs80 command set
implemented by the 795XB disc controller. Consult the FALSTAFF III
CONTROLLER ERS and the FALSTAFF III UTILITY ERS for these details.

DATE

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RF:Y.

THIS
ISSUE

12/4/87

~G.

NO.

A-5959-1468-1

PAGE 3

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2.0 RELATED DOCUMENTS

1)

HP 9753X Series Product Description

2)

HP 9753X Series OEM Product Manual

3)

795XB/796xB Controller ERS

4)

795XB/796xB Controller Utilities ERS

(A-5959-3912-1)
(A-5959-3913-1)

5) Falstaff II Power-On Self-Test Description

BEY.A

6)

Falstaff III Reliability Plan

7)

Controller Board IMS

8)

Panasonic Power Supply Specification

DATE
THIS
ISSUE

12/4/87

OOG.

NO.

(includes specification and test definitions)

(A-07957-60010-3)

A-5959-1468-1

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. 3.0 GENERAL DESCRIPTION

3.1 Product Overview

The 7957B, 7958B, and 7959B disc drives are high performance, random access,
fixed media mass storage devices. They are packaged in a compact 130mm high
"Rosebud" style desktop cabinet that looks identical to the 7941/45.
Formatted capacities are 81, 152, and 304 megabytes, respectively.
Seek times less than 18 msec, full HPIB bandwidth data transfer rate, and a
high performance HPIB controller combine to yield performance that will meet
or exceed 791X levels. In addition, the drives will be extremely rugged,
with unsurpassed shock, vibration, and temperature performance.
Factory cost at introduction will be under $1800 for the 7959B, under $1700
for the 7958B, and under $1600 for the 7957B. It is expected that this
combination of mid-range capacity, low cost, high performance, and compact
size will quickly make the 795XB the preferred choice over today's 7941/45
and 7912/14 products.
The drives are based on Hewlett-Packard designed and built disc mechanisms.
The 7959B uses the HP 97536A mechanism, while the 7958B uses the HP 97533A,
and the 7957B uses the HP 97532A. All mechanisms use 5.25" thin film media
with thin film read/write heads. Each has a rotary actuator with one head
per surface, and all use embedded servo on each surface. The interface to
the mechanism conforms to the ESDI industry standard.
The 795XB series have four major sub-assemblies: the disc mechanism, HPIB
Controller peA, power supply, and cabinet (with associated cables, etc.)
The standard configuration for this product is the desktop package. The
desktop unit can also be installed into any floor mount "pod" style cabinets
that accept "Rosebud" stack-modules (the feet must be removed from the drive
package in this case). The drives can also be installed in 19" EIA racks
using the 19500B Rackmount Kit.

A
REV.

DATE
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ISSUE

12/4/87

WG.

NO.

A-5959-1468-1

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·3.0 GENERAL DESCRIPTION (cont'd)

3.2 Feature Summary

*

Multi-user capabilities with low entry cost
- 304, 152, and 81 megabyte capacities
- High performance (greater than or equal to 7914)
- Unsurpassed shock/temperature performance

*

Compact 130 mm Rosebud stack-module package

*

HPIB/CS80 interface

*
*

794x/5XA software compatible (in both on-line and diagnostic modes)
Environmental specifications broader than 791X, 794x, or 195XA

*

Improved serviceability/reliabiity through new controller features
- Autosparing
- Gate Array which reduces component count

*

Improved performance
- Reduced F/W overhead (0.8 msec)
- Enhanced channel utilization algorithm during both reads and
writes

DATE

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'3.0 GENERAL DESCRIPTION (cont'd)

3.3 Products and Configurations

3.3.1

Standard Configuration
The standard configuration for either drive is a desktop
enclosure.
7957B
7958B
7959B

3.3.2

81 Mbyte desktop unit
152 Mbyte desktop unit
304 Mbyte desktop unit

Options
Option 015:
Option 550:

3.3.3

Accessories
19500B
92211A

A
REV.

DATE
ISSUE 12/4/87

THIS

230 Volt operation
Delete HPIB cable

19" EIA Rackmount Kit
Pod-type floor mount cabinet

OOG'A-5959-1468-1

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4.0 PHYSICAL CHARACTERISTICS

4.1 Desktop

Length - 285 mm

(11.2")

- 325 mm

(12.8")

Width

Height - 132 mm
129 mm
Weight - 10.6 kg

(5.2") with cabinet feet
(5.1") without cabinet feet
(23.2 lb)

Shipping weight - 13.6 kg

(29.9 lb)

4.2 Rackmount

The desktop package is placed on a 19500B Rackmount Tray.
documentation for rack mount specifications.

DATE

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OOG.
NO.

A-5959-1468-1

PAGES

2~r

See 19500B

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'5.0 PRODUCT CAPABILITIES
5.1 Capacity

+--------+--------------+-------------+----------+--------+-------+
I
I Data Bits
I Data Bytes I Sectors I Tracks I Heads I
I

I

Item

Per

I

I

Per

Per

I

Per

I

Per

I

+--------+--------------+-------------+----------+--------+-------+
IByte
I
8
I
I
ISector I
ITrack I

2,048
256 I
129,024
16,128 I
63
17957B Hdl 163,731,456
20,466,432 I
79,947
158/9B Hdl 202,825,728
25,353,216 I
99,036
IHP 7957BI 654,925,824 I 81,865,728 I 319,788
IHP 7958BI1,216,954,368 1 152,119,296 I 594,216
IHP 7959BI2,433,908,736 I 304,238,592 11,188,432

I
I
I
I

1,269
1,572
5,076
9,432
18,864

4
6
12

I

1
1

+--------+--------------+-------------+----------+--------+-------+
5.2 Seek Times:

WORST CASE

TYPICAL

-------------------------------------+------------------3 milliseconds
4 milliseconds

Track-to-track
Average
Full stroke
Incremental Head
Switch

17 milliseconds*
32 milliseconds
3 milliseconds

19 milliseconds
36 milliseconds
4 milliseconds

* Aggressive seeks option turned on.
5.3 Spindle Speed

3348.2 RPM +1-

1%

8.96 millisecond average latency

5.4 Transfer Rates

Burst:

1000 kbytes/sec

Typical:

'853 kbytes/sec

(multi-sector transfers with all sectors
contiguous within one track)

5.S HPIB Controller Firmware Overhead

0.8 milliseconds per read or write request

DATE
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6.0 ENVIRONMENTAL SPECIFICATIONS
6.1 Temperature

6.1.1

Operating

5 to 45 degrees C (41 to 113 degrees F)

6.1.2

Non-Operating

-40 to +65 degrees C (-40 to +149 degrees F)

6.1.3

Recommended

20 to 25.5 degrees C (68 to 78 degrees F)

6.1.4

Slew Rate

<= 20 degrees C per hour

6.1.5

SPECIAL NOTE:
If shipment or storage is at temperatures of 32 degrees F or
below, allow two hours of warmup at room temperature before
operating. Failure to do so may result in severe damage to
the unit.

6.2 Humidity

6.2.1

Operating *

6.2.2

Non-Operating* 8-80% non-condensing

6.2.3

Non-Operating Humidity Supersoak *
+65 C @80% relative humidity for 24
hours, no permanent damage (other than
cosmetic change to internal and exterior
plated metal surfaces)

8-80% non-condensing

* Excludes all conditions which can cause condensation in or
on the disc drive.

6.3 Shock

6.3.1

Operating

[half sine, duration <= 11 ms]

<= 4g peak, no data loss, and no damage
6.3.2

Non-Operating
20g peak half sine, <= 11 ms duration, no damage or data loss

6.3.3

RECOMMENDED LIMIT:

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