MICROPOLIS 1303 HARD DISK DRIVE REPAIR, MICROPOLIS 1303 MFM HARD DISK DRIVE REPAIR, SPECIFICATIONS, JUMPERS,
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Specifications



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Micropolis 1303 Specifications
Model Capacity Size Height Bus Type Int.Type
Micropolis 1303 35MB 5.25" FHT MFM ST412

Size 5-1/4"
Interface ST-506/412
Interface Type   
Encoding Method MFM 
Formatted Capacity 34 MB
Disks 3
Heads 5
Cylinders 830
Sectors 17
Buffer Size N/A
Average Seek 30 msec
Single Track 6 msec
Rotation Speed/Avg. Latency 3600 rpm +/- 0.5%
Transfer Rate to / from media 5 Mbits/sec
Transfer Rate to / from buffer N/A
Tracks Per Inch (TPI)  
Bits Per Inch (BPI)   
Dimensions 8.0"L x 5.75"W x 3.25"H
Weight 5.75 lbs.


POWER REQUIREMENTS
  +12V +/-5% +5V +/-5% Power
Spin up   3.9A (max)    
Read / Write   2.0A avg  0.9A avg  
Typical      29 Watts

Notes:
Drive Addressing and Interface Termination


DS1, DS2, DS3, DS4 Drive Select Jumpers
  The Drive Select jumper locations are identified as DS1, DS2, 
  DS3, and DS4. Only one Drive Select jumper is installed on a 
  drive. The drives are shipped with the jumper installed at DS1.
  For every drive in a PC/AT installation, move the jumper from DS1
  to DS2 (the special twisted interface cable that is generally
  used takes care of assigning a unique address to each drive).
  Some other systems may require that each drive be jumpered to a
  unique address (i.e., different DS numbers).

RN1 Interface Terminator
  The Interface Terminator factory installed at RN1 provides proper
  termination for the interface lines. When daisy-chaining multiple
  1303 drives, leave the terminator in the last physical drive on
  the daisy chain cable; remove the terminator from each of the
  other drives. In most PC/AT installations, the C: drive is
  actually at the end of the cable and should retain the
  terminator.

W1 Write Fault Latch
  W1 is the Write Fault Latch. If W1 is present and the drive
  encounters a write fault, all writing to the drive is inhibited
  until after the drive has been de-selected. If W1 is absent,
  fault conditions are not latched. Drives are shipped with a
  jumper installed at W1; remove it for PC/AT installations.

W2 is always installed.

W7 is never installed.

W8 is always installed.

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