Miniscribe_8051A_Brochure Miniscribe 8051A Brochure

Miniscribe_8051A_Brochure Miniscribe_8051A_Brochure

User Manual: Miniscribe_8051A_Brochure

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51.3 M Byte 3 'l'2 "
Winchester Disk Drive

8051A

The MiniScribe model 8051A is
MiniScribe's solution for the new generation
of AT* compatible, portable and desk top
computer systems.
The 8051A is a 3V2 -inch 42 MByte drive
with an on-board AT controller. The
integration of the controller onto the drive
increases system reliability and lowers
overall system cost.
A rotary voice coil is utilized to achieve a
fast 28 msec. average access time reliably.
An embedded servo system is used to
maximize data rel iability. The embedded
servo system sign ificantly reduces
mispositioning due to thermal off track .

The 8051A features automatic park and
lockdown at a dedicated landing zone.
Like all MiniScribe products, the 8051 A
undergoes a rigorous testing and burn in
process to insure the highest reliability.
The MiniScribe line of 3V2-inch and
5V4 -inch Winchester disk drives begin
at 12.75 MBytes and extend to high
capacity/high performance models.

• AT is a trademark of IBM Corp.

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31/2" AT Winchester
Disk Drive Specifications
Capacity Unformatted
Per Drive (MBytes)
Per Track (Bytes)

51 .3
17,220

Capacity Formatted
Per Drive (MBytes)
Per Track (Bytes)
Per Sector (Bytes)
Sectors Per Track

42.0
14,336
512
28

Functional
Disks
R/W Heads
Cylinders
Total Data Tracks
Track Density (tpi)
Recording Density (bpi)
Areal Density (Mbits/sq.in .)
Rotational Speed (RPM)

2
4
745
2,980
1,109
23 ,202
25 .73
3,484

DC Power Requirements
+ 5 VDC ±5%
+12 VDC ±5%
Max . Starting (5 sec.)

0.5 amps typical
0.5 amps typical
2.0 amps

Power Dissipation

8.0 watts avg .

Environmenta l Limits
Ambient Temperature
Relative Humidity
Maximum Wet Bulb

Physical
Height
Width
Depth
Weight

Data Transfer Rate
Device (Mbits per second)
Host (MBytes per second)

8.0
up to 4.0

Access Time
(including settling)
Average (msec.)
Track-to-track (msec.)
Maximum (msec.)
Latency (average, msec.)

28
5
60
8.61

Interface

AT

MTBF

Error Rates
Soft Read Errors
Hard Read Errors
Seek Errors

30 ,000 hours
None
30 minutes
5 years

per 10 lObits
per 10'2 bits
6
per 10 seeks

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1.625 in.
(41 .3 mm)
4.00 in .
(101 .6 mm)
5.75 in.
(164 mm)
1.43 Ibs.
(.65 kg)

Features and specifications subject to change
without notice.
© 1987 MiniScribe Corporation . All rights
reserved . Printed in U.S.A. 10/87.

Reliability
PM
MTTR
Component Design Life

40°F to 122°F
(5°C to 50 0c)
8% to 80%
78°F (26°C)

for Data Storage
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