Hard Disk Drive
|Micropolis 4221WAV||2050MB||3 1/2"||SCSI2|
|Formatted Capacity||2,050 MB|
|Average Seek||8.9. msec|
|Rotation Speed/Avg. Latency||7200 rpm +/- 0.5%|
|Transfer Rate to / from. media||20 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|
|+12V +/-5%||+5V +/-5%||Power|
|Read / Write||1.7A||.9A|
|Typical seeking||11.5 Watts|
|Configuration and Jumper Options|
SCSI ID Selection
Up to sixteen devices (the host and fifteen targets) can be attached to the SCSI bus.
These are selected with jumpers on the Option Jumper Block or on Auxiliary
Connector J1B (use either but not both); see the Note below the J1B drawing for J1B usage.
In multiple-device systems, each device must have its own Unique SCSI ID.
The SCSI ID (drive address) jumpers are identified as ID0, ID1, ID2, and ID3.
ID selection is binary, as shown below.
If terminators are installed at RN1, RN2, and RN3 (default), the drive provides termination for the SCSI interface. If the terminators are not installed, the drive does not provide interface termination. SCSI terminators are installed only in the end devices on the SCSI cable; remove the terminators from each of the other devices. The SCSI Host Adapter card and the last drive in the chain should have terminators.
W1 and W2 select the source of power (+5V) for the interface terminators; W3 controls the drive supplying +5V to the bus.
Remote LED A user-supplied LED may be connected to Remote LED (Pins 1 and 2).
Auxiliary Connector J1B