Seagate ST157A-0 HARD DISK DRIVE REPAIR, Seagate ST157A-0 HARD DISK DRIVE SPECIFICATIONS,
Seagate ST157A-0 hard disk drive sales, Seagate ST157A-0 hard disk drive repair, Seagate ST157A-0 hard disk drive specifications, 
Seagate ST157A-0 Hard Disk Drive Repair, Seagate ST157A-0 Hard Disk Drive Specifications, Seagate ST157A-0 Seagate ST157A-0
Specifications



seagate st157a-0 picture.
seagate st157a-0 picture.
seagate st157a-0 picture.

Seagate ST157A-0 Specifications
Model Capacity Size Height Bus Type Int.Type
ST157A-0 38MB 3.5" HHT IDE AT

Legacy   :    ST157A
Legacy

Capacity: 
Speed: 
Average Read Time: 
 Cylinders: 
Heads: 
Sectors: 

44.7 MB
3600 rpm
40 ms
733
7
17
ST-157A

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          � 0 1  Single Drive            0=open
          � 1 1  Dual-Drive Master       1=closed
          � 1 0  Dual-Drive Slave
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          ������ Optional External LED



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          � � � � �
          � � � � � LT (Life Test, factory use only)
          � � 0 1   Single Drive            0=open
          � � 1 1   Dual-Drive Master       1=closed
          � � 0 0   Dual-Drive Slave
          � ������  EWS (factory use only)
          ��������  Active Busy (Optional External LED)


                          ST - 157A

       UNFORMATTED CAPACITY (MB) ________________57
       FORMATTED CAPACITY (26 SECTORS) (MB) _____44.7
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________3,360
       CYLINDERS ________________________________560
       HEADS ____________________________________6
       DISCS ____________________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL (2,7)
       TRANSFER RATE (mbits/sec) ________________7.5
       SPINDLE SPEED (RPM) ______________________3,600
       AVERAGE LATENCY (mSEC) ___________________8.3
       BUFFER ___________________________________2 Kbyte
       INTERFACE ________________________________AT BUS
       SECTORS PER DRIVE ________________________87,360
       TPI (TRACKS PER INCH) ____________________824
       BPI (BITS PER INCH) ______________________20,280
       AVERAGE ACCESS (ms) ______________________40/28*
       SINGLE TRACK SEEK (ms) ___________________8
       MAX FULL SEEK (ms) _______________________ /70
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.35
                           +5V TYPICAL (amps) ___0.9
                           TYPICAL (watts) ______9
                           MAXIMUM (watts) ______29
       BUFFERED STEP PULSE RATE (micro sec) _____3-200
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________36,(or 14, 17 or 21)**

       *ST157A-0/ST157A-1

Possible translation:   733 cyl, 7 heads, 17 sectors = 44,660,224
Possible translation:  1024 cyl, 5 heads, 17 sectors = 44,564,480

Note: A "custom" or "user-defined" CMOS drivetype  may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder.  A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".

 ** MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE.  ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE.

PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION

WARNING - Already low-level formatted at the factory.

Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.

Seagate reserves the right to change, without notice, product 
offerings or specifications. (6/26/90)

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