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

Micropolis 1598-15

Hard Disk Drive


Model Capacity Size Height Interface Bus Type
Micropolis 1598-15 1034MB 5.25" FHT SE SCSI2


Size 5-1/4"
Interface SCSI-2
Encoding Method RLL
Formatted Capacity 1034.6 MB
Disks 8
Heads 15
Cylinders 1928
Sectors 71
Buffer Size N/A
Average Seek 14.5 msec
Single Track 4 msec
Rotation Speed / Avg. Latency 3600 rpm +/- 0.5%
Transfer Rate to / from media 20 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 4.35A (max)
Read / Write 2.0A avg 2.0A avg
Typical 30 Watts


Drive Addressing and Interface Termination

             |  _ID1 
             | |  _ID0 
             | | |                        Pin 1 
         J2  | | |              J1            |       J3  
      ___________    __________________________     ________ 
    _|           |  |                          |   |        | 
   | |___________|_ |__________________________|___|________| 
   |  ..  ..                                                | 
   |  W5  W4          RN9         W2                        | 
   |                              W1                 W11    |
   |                                                        | 
   |                                                    W28 | 
   |                                                        | 
   |                                                        | 
   |                                                        | 
   |                                                        | 
   |                                                        | 
   |                                 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 drive must
  have a unique address. Drives are configured as SCSI ID 7 at the factory.

RN9 Interface Terminator
  The Interface Terminator factory installed at RN9 provides
  proper termination for the interface lines. When daisy-chaining
  multiple drives, leave the terminator installed only in the last
  physical drive (or drives) on the daisy chain cable; remove the
  terminator from each of the other drives (or the host computer).

W1, W2, Terminator Option
  W1 and W2 select the source of terminator power (+5V) for the
  interface terminator. If a jumper is installed at W1(the factory
  default configuration), and no jumper is installed at W2 the
  drive provides terminator power. This configuration is used
  for PC/AT applications. If a jumper is on W2 the host adapter
  will supply terminator power. If a jumper is installed at W2 and
  W11, and no jumper is installed at W1 the drive provides
  terminator power to it's on-board terminators and also to the
  SCSI bus via interface connector J1, pin 26.

W11 Bus Option
  W11 allows the drive to supply interface terminator power to the
  SCSI Bus. If W11 is not installed and W1 is jumpered (the factory
  default configuration), the drive does supply SCSI bus interface
  terminator power. W11 should not be installed for PC/AT

W5 Spindle Option
  Selects the spindle control option. If W5 is jumpered, the
  drive must wait 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 installations.

W4 Bus Parity 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 usually not installed for PC/AT
  applications. Verify the correct configuration required by your
  Host Adapter.

W28 Ground Options
  W28(only implemented on Rev B and later boards) is used to
  connect the drive's logic ground to frame ground. When at jumper
  is installed at W28, frame ground is connected to logic ground.

  When a jumper is not installed at W28 (the factory default
  configuration), frame ground is not connected to logic ground.
  For PC/AT applications, is a jumper should be installed at W28.

Notes on OEM use

Digital Equipment Corporation (DEC) used the Micropolis 1598 drives white-labeled as the DEC RZ57 / RZ57-E hard-disk drives for their PDP11/10 VAX machines.
This drive was also commonly used in Micropolis MicroDisk 1030 desktop SCSI drive enclosures.
More about Micropolis OEM supplies can be read in Legacy OEM products.