Micropolis hard Disk Drives, Specifications, Support, Specs, Jumpers, Manual, Images

Micropolis 1578-15

Hard Disk Drive


Model Capacity Size Height Interface Bus Type
Micropolis 1578-15 332MB 5.25" FHT SE SCSI1


Size 5-1/4"
Interface SCSI
Encoding Method RLL
Formatted Capacity 6331.7 MB
Disks 8
Heads 15
Cylinders 1224
Sectors 36
Buffer Size N/A
Average Seek 16 msec
Single Track 4 msec
Rotation Speed / Avg. Latency 3600 rpm +/- 0.5%
Transfer Rate to / from media 15 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 4.25A (max)
Read / Write 2.25A avg 2.0A avg
Typical 32 Watts


Drive Addressing and Interface Termination

                                                PIN 1
            J2                     J1              |
      ____________   _______________________________      J3
   __|            |_|                               |___________ 
  |  |____________| |_______________________________| |  POWER  |
  |                     RN202     RN203     RN204     |_________|
  |                                                             |
  |                                                             |
  |                             ... W201                        |
  |                             123                             |
  |                                                             |
  |                                                      W5     |
  |                                                      W4     |
  |   (Component Side)                                  W20     |
  |                                                     ID0     |
  |                                                     ID1     |
  |                                                     ID2     |
  |                                                             |

                ____ ID2
               | ___ ID1
               || __ ID0                        PIN 1
          J2   |||                 J1              |
      ____________   _______________________________      J3
   __|            |_|                               |___________
  |  |____________| |_______________________________| |  POWER  |
  |                     RN202     RN203     RN204     |_________|
  |  W4 W5                                                      |
  |                                                         W21 |
  |                             W1 W2                           |
  |                                                             |
  |                             W11                             |
  |                                                             |
  |                                                      W20    |
  |   (Component Side)                                          |
  |                                                             |
  |                                                             |
  |                                                             |
  |                                                             |

ID0, ID1, ID2 SCSI Address Jumpers
  The SCSI ID (drive address) jumpers are identified as ID0, ID1,
  and ID2. ID selection is binary, as shown in the table below.
0 out out out
1 out out in
2 out in out
3 out in in
4 in out out
5 in out in
6 in in out
7 in in in

   For multiple drive installations, on one Host Adapter, each drivedrive must
  have a unique address. Drives are configured as SCSI ID 0 at the factory.

RN202, RN203, RN204 Interface Terminatorr
  The Interface Terminators factory installed at RN202, RN203, and
  RN204 provide proper termination for the interface lines. When
  daisy-chaining multiple drives, leave the terminators installed
  only in the last physical drive on the daisy chain cable; remove
  all three terminators 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 terminators.

W201 or W1, W2 Terminator Options
  W201 positions 1-2 and 2-3 (or W1 and W2, respectively, on second
  board shown) select the source of terminator power (+5V) for the
  interface terminators. If a jumper is installed at positions 1-2
  (W1) and no jumper is installed at position 2-3(W2)(the factory
  default configuration), the drive provides terminator power. This
  configuration is used for PC/AT applications. If no jumper is
  installed at W201 position 1-2(W1) but a jumper is installed at
  position 2-3(W2), terminator power must be provided by the host
  computer system via interface connector J1, pin 26.

W11 Bus Option
  W11 (only present on Rev C and higher boards of the second type
  shown) allows the drive to supply interface terminator power to
  the SCSI Bus. If W11 is not installed (the factory default
  configuration), the drive does not supply SCSI bus interface
  terminator power. W11 should not be installed for PC/AT

W5 Spindle Option
  W5 selects the spindle control option. If W5 is installed, the
  drive waits for a Start Spindle command (after power is applied)
  to start the spindle motor. If W5 is not installed (the factory
  default configuration), the drive automatically starts the
  spindle motor at power-on. W5 is not installed for PC/AT

W4 Bus Parity Check Option
  W4 selects the parity check option. If W4 is installed, the drive
  neither generates nor detects parity. If W4 is not installed (the
  factory default configuration), the drive generates parity and
  enables parity detection. W4 is not installed most PC/AT
  applications. Verify the correct configuration required by your
  Host Adapter.

W21 Ground Options
  W21(only implemented on Rev C and higher boards of the second
  type shown) is used to connect the drive's logic ground to frame
  ground. The factory default configuration, which should be used
  for PC/AT applications, is a jumper installed at W21.

W20 Reserved
  Jumper must be installed

Also refer to the notes on installation in HP workstations or in workstations from Sun Microsystems.