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 3
V2
-inch 42 MByte drive
with
an
on
-board
AT
controller. The
integration of the controller onto the dri
ve
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
ma
ximize data
rel
iability. T
he
embedded
servo system significantly 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
Min
iScribe line of 3
V2
-inch
and
5
V4
-inch Winchester disk drives begin
at 12.75 MBytes
and
extend
to
high
capacity/high performance model
s.
•
AT
is a trademark of IBM
Cor
p.
~_
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I
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Data
Storage
31/2"
AT
Winchester
Disk
Drive
Specifications
Capacity Unformatted
Per
Drive (MBytes)
Per
Track
(Bytes)
Capacity Formatted
Per
Drive (MBytes)
Per
Track
(Bytes)
Per
Sector (Bytes)
Sectors
Per
Track
Functional
Disks
R/W
Heads
Cylinders
Total
Data
Tracks
Track Density (tpi)
Recording Density (bpi)
Areal Density (Mbits/sq.in.)
Rotational Speed
(RPM)
Data Transfer Rate
Device (Mbits per second)
Host (MBytes per second)
Access Time
(including settli
ng)
Average (msec.)
Track-to-track (msec.)
Maximum (msec.)
Latency (average, msec.)
Interface
Reliability
MTBF
PM
MTTR
Component Design Life
Error Rates
Soft
Read
Errors
Hard
Read
Errors
Seek Errors
51
.3
17
,220
42.0
14
,336
512
28
2
4
745
2,980
1,109
23
,202
25
.73
3,484
8.0
up
to
4.0
28
5
60
8.
61
AT
30
,000 hours
None
30
minutes
5 years
per
10
lO
bits
per
10
'2
bits
per
10
6 seeks
DC Power Requirements
+ 5 VDC
±5%
0.5 amps typical
+12
VDC
±5%
0.5 amps typical
Max. Starting
(5
sec.) 2.0 amps
Power Dissipation 8.0 watts
avg
.
Env
ironmental Limits
Ambient Temperature
40°F
to
122°F
(5°C
to
50 0c)
Relative Humidity 8%
to
80%
Maximum
Wet
Bulb 78°F (26°C)
Physical
Height 1.625
in.
(41
.3 mm)
Width 4.00
in
.
(101
.6 mm)
Depth 5.75
in.
(164
mm)
Weight 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.
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MiniCr,..ik~
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I
III
11-.1'-.-1
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====
S:;!:.:t::ms for
Data
Storage

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