Seagate ST125A-0 HARD DISK DRIVE REPAIR, Seagate ST125A-0 HARD DISK DRIVE SPECIFICATIONS,
Seagate ST125A-0 hard disk drive sales, Seagate ST125A-0 hard disk drive repair, Seagate ST125A-0 hard disk drive specifications, 
Seagate ST125A-0 Hard Disk Drive Repair, Seagate ST125A-0 Hard Disk Drive Specifications, Seagate ST125A-0 Seagate ST125A-0
Specifications



seagate st125a-0 picture.
seagate st125a-0 picture.
seagate st125a-0 picture.

Seagate ST125A-0 Specifications
Model Capacity Size Height Bus Type Int.Type
ST125A-0 21MB 3.5" HHT IDE AT

Legacy   :    ST125A
Legacy

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

21.5 MB
3600 rpm
40 ms
615
4
17



ST-125A

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          � 1 1  Dual-Drive Master       1=closed
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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 - 125A

       UNFORMATTED CAPACITY (MB) ________________25
       FORMATTED CAPACITY (26 SECTORS) (MB) _____21.5
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________1,616
       CYLINDERS ________________________________404
       HEADS ____________________________________4
       DISCS ____________________________________2
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL
       TRANSFER RATE (mbits/sec) ________________7.5
       SPINDLE SPEED (RPM) ______________________3,600
       INTERFACE ________________________________AT BUS
       TPI (TRACKS PER INCH) ____________________824
       BPI (BITS PER INCH) ______________________16,546
       AVERAGE ACCESS (ms) ______________________40/28*
       SINGLE TRACK SEEK (ms) ___________________8
       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 ________________________6

       *ST125A-0/ST125A-1

Possible translation:   615 cyl,  4 heads, 17 sectors = 21,411,840

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)".

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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