MICROPOLIS 1991W HARD DISK DRIVE REPAIR, MICROPOLIS 1991W SCSI HARD DISK DRIVE REPAIR, SPECIFICATIONS, JUMPERS,
micropolis 1991w hard disk drive specifications, Micropolis 1991W Hard Disk Drive Specifications, Jumpers,
micropolis 1991w hard disk drive repair, Micropolis 1991W Hard Disk Drive Repair,
micropolis 1991W hard disk drive specs, Micropolis 1991W Hard Disk Drive Specs,
micropolis 1991W hard disk drive repair, Micropolis 1991W Hard Disk Drive Repair Micropolis 1991W
Specifications



micropolis 1991w picture.
micropolis 1991w picture.
micropolis 1991w picture.

Micropolis 1991W Specifications
Model Capacity Size Height Bus Type Int.Type
Micropolis 1991W Scorpio 9 9091MB 5.25" FHT SCSI2 W

Size 5-1/4"
Interface SCSI-2F
Encoding Method  
Formatted Capacity 9090 MB
Disks  
Heads  
Cylinders 4477
Sectors Variable
Buffer Size N/A
Average Seek 12 msec
Single Track 5.56 msec
Rotation Speed / Avg. Latency 5400 rpm +/- 0.5%
Transfer Rate to / from media 10 Mbytes / sec Synchronous
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 2.3A    
Read / Write 4.8A 1.0A  
Typical seeking     33 Watts

Notes:
Drive Addressing and Interface Termination
         
                  ___________Slave sync (pin 20)
        |   ________Master sync (pin 16)
        |  |  ______Bus parity check option ( 7th set of  pins) 
        |  | | _____SCSI-1/2 Select (6th set of pins)
        |  | || ____Spindle control option (4th set of pins)
        |  | ||| ___ID2    
        |  | |||| __ID1        
        |  | ||||| _ID0                    Pin 1  
        |  | ||||||                             |             
        ___________    __________________________     ________  
      _|    J2     |  |          J1              |   |   J3   |  
     | |___________|_ |__________________________|___|________|  
     |                 ___________    ___________             |
     |                |___________|  |___________|            |
     |                         RN2    RN1                     |
     |                    W2                                  |
     |                    ..                                  | 
     |                W1 :  :W3                  : W9         |  
     |                                       Frame Ground     |    
     |                                                        |
     |                                                        |  
     |                                                        |  
     |                                                        |  
     |                                                        |  
     |                                                        |
     |                                     LED                |
     |                                    Connector | |       |  
     |                                                        |
 
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.
SCSI
Address
Jumpers
ID2 ID1 ID0
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.

RN4 & RN5 Interface Terminators
  The Interface Terminator factory installed at RN6 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).

Bus Termination Power Option
  A jumper is installed at W6, at W8, or at W5 to select the source of terminator
  power (+5V) for the SCSI Bus terminator packs on the device electronics board.

  When a jumper is installed at W6 (the factory default configuration), the drive
  provides terminator power to it's on-board terminators.

  When a jumper is installed at W8 , terminator power is is provided by the host
  system via the interface cable J1, pin 26 (TERMPWR).

  When a jumper is installed at both W8 and W5, the drive provides terminator
  power to its on-board terminators and also to the SCSI bus via interface cable J1,
  pin 26(TERMPWR).

Frame Ground Options
  Jumper W9 selects the frame ground option.

  When W9 is installed, the drive's frame is connected to frame ground.

  When a jumper is not installed at W9 (the factory default configuration), frame
  ground is not connected to logic ground.

Spindle Control Options
  A jumper bridging pins 7 and 8 of J2 (the 4th set of pins) is used to select the
  spindle control option.

  When a jumper is installed, the drive must wait for an interface Start Unit
  command to start the spindle motor.

  When a jumper is not installed (the factory default configuration), the drive
  automatically starts the spindle motor at power-on.

SCSI-1/2 Select
  A jumper at WP selects SCSI-1 or SCSI-2. If the jumper is installed
  (the factory default configuration), the drive is configured as a SCSI-2 device.
  the drive is not write protected.

Bus Parity Option
  A jumper bridging pins 13 and 14 of J2(7th set of pins) is used to select the
  parity check option.

  When a jumper is not installed, (the factory default configuration), the drive
  generates parity and enables parity detection.

  When a jumper is installed, the drive neither generates nor detects parity.

Spindle Synchronization Option
  The Rotational Position Locking field (MODE SELECT command, Page Code 04h)
  is used to specify spindle synchronization operation; see document #110366
  (Scsi Implementation in Micropolis "MZR" Products) and ANSI SCSI Standard.

  Unsynchronized: If the drive is set to Unsynchronized (PRL=00b), it ignores the
  SLAVE SYNC signal.

  Slave: If the drive is set to Slave (RPL=01b), it does not generate the MASTER SYNC
  signal or the SLAVE SYNC signal but synchronizes its index to the SLAVE SYNC
  signal (J2,pin 20) supplied by an external source.

  Master: If the drive is set to MASTER (RPL=10b), it generates the SLAVE SYNC
  output signal (j2,pin 20) for use directly by the slave drives.

  Master Control: If the drive is set to Master Control (RPL=11b), it generates the
  MASTER SYNC signal(j2,pin 20). This output is used by the controller to generate
  the SLAVE SYNC signal(J2,pin 20) for the slave drives.

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