MICROPOLIS 4221 HARD DISK DRIVE REPAIR, MICROPOLIS 4221 SCSI HARD DISK DRIVE REPAIR, SPECIFICATIONS, JUMPERS,
micropolis 4221 hard disk drive specifications, Micropolis 4221 Hard Disk Drive Specifications, Jumpers,
micropolis 4221 hard disk drive repair, Micropolis 4221 Hard Disk Drive Repair,
micropolis 4221 hard disk drive specs, Micropolis 4221 Hard Disk Drive Specs,
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Specifications



micropolis 4221 picture. micropolis 4221 picture.
micropolis 4221 picture.

Micropolis  4221 Specifications
Model Capacity Size Height Bus Type Int.Type
Micropolis 4221 (10/95) REV. B 2050MB 3.5" SL SCSI2 Fast

Size 3 1/2" 
Interface SCSI-2F
Encoding Method  
Formatted Capacity 2.05 MB
Disks  5
Heads  9
Cylinders 4150
Sectors Variable
Buffer Size N/A
Average Seek 8.9. msec
Single Track  
Rotation Speed/Avg. Latency 7200 rpm +/- 0.5%
Transfer Rate to / from. media 10 Mbytes/sec  Synchronous
Transfer Rate to / from buffer  
Tracks Per Inch (TPI)  
Bits Per Inch (BPI)   
Dimensions 5.75"D x 4.0"W x 1.0"H
Weight 0.00 lbs.

POWER REQUIREMENTS
  +12V +/-5% +5V +/-5% Power
Spin up .6A    
Read / Write 1.4A .7A  
Typical seeking     7.5 Watts

Notes:

DRIVE ADDRESSING AND INTERFACE TERMINATION


SCSI ADDRESS JUMPERS (ID0, ID1, ID2)
 

Up to eight devices (the ~q4 and seven targets) can be attached to the SCSI bus at one time. ID jumpers ID0, ID1, and ID2 are used to assign one of eight SCSI iID bits (0-7) to the drive. Note also that there are two jumper sets to set SCSI id settings, one closer to the LED, the other in the middle of the board. We do not preconfigure the block closest to the LED (default set to 0) but do configure the middle block to SCSI id 7 (factory default configuration.
In multiple device systems, each drive must have its own unique SCSI ID.

SCSI Jumpers
Address 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 (default) in in in
INTERFACE TERMINATOR (RN1, RN2)
 The Interface Terminator factory installed at RN1 and RN2, which
   provides proper termination for the interface lines. When 
   daisy-chaining multiple drives, leave the terminators installed 
   only in the last physical drive (or drives) on the daisy chain 
   cable; remove the terminating resistors from each of the other drives 
   (or the host computer). 

BUS TERMINATION POWER OPTION (W1, W2, W3)
  A jumper is installed at W1, at W2, or at W2 and W3 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 W1 (the factory default configuration), 
  the drive provides terminator power to it's on-board terminators, otherwise 
  known as local termination power.

  When a jumper is installed at W2 , terminator power is is provided by 
  the host system via the interface cable J1, pin 26 (TERMPWR).

  When a jumper is installed at both W1 and W3, the drive provides     
  terminator power to its on-board terminators and also to the SCSI bus 
  via interface cable J1, pin 26 (TERMPWR).

SPINDLE CONTROL OPTION
  A jumper at SPIN0 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.

SPINDLE DELAY OPTION
  A jumper at SPIN1 is used to select the spindle delay option 
  (spindle start-up is delayed based upon the SCSI ID). Delay time
  per ID is 12 seconds.

  When a jumper is installed, spindle delay is enabled.
 
  When a jumper is NOT installed, (the factory default configuration),
  spindle delay is disabled.

BUS PARITY OPTION
  A jumper at PTY is used to select parity check option.

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

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

WRITE PROTECT OPTION
  A jumper at WP is used to write protect the drive. Please note that the

  When a jumper is installed, the drive is write protected.

  When a jumper is not installed (factory default configuration), data can be 
  written to the drive (

REMOTE LED SELECTOR  
  When a remote LED is connected to the LED jumper, both LEDs (On device 
  electronics boards and remote location) are enabled.

  When a remote LED is not connected to the LED jumper, only the device 
  electronics board LED is enabled.

SPINDLE SYNCHRONIZATION OPTION
  Jumpers installed at W10 and W11 provide termination for the Spindle
  Synchronization signals (Slave Sync and Master Sync respectively).

  When Spindle Synchronization is to be implemented, jumpers W10 and W11
  are removed from all drives except the last drive on the cable.

  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-2 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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