|Micropolis 1684-7 Specifications|
|Formatted Capacity||339.6 MB|
|Average Seek||14 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 1.625"H|
|+12V +/-5%||+5V +/-5%||Power|
|Spin up||2.0A (max)|
|Read / Write||.9A avg||.8A avg|
|Drive Addressing and Interface Termination
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.
For multiple drive installations, on one Host Adapter, each drive must
have a unique address. Drives are configured as SCSI ID 0 at the factory.
RN9 Interface Terminator
The Interface Terminators 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 selects the source of terminator power (+5V) for the interface
terminators. When 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 installed at W2,
terminator power is provided by the host system via interface cable J1, pin 26.
If a jumper is installed at W2 and W31, the drive provides terminator power to
its on-board terminators and also to the SCSI bus via interface cable J1.
W31 Bus Option
W31 allows the drive to supply interface terminator power to the SCSI Bus.
If W31 is not installed (the factory default configuration), the drive does not
supply SCSI bus interface terminator power. W31 should not be installed for
W3, Spindle Option
W3 selects the spindle control option. If W3 is installed, the drive waits for a
Start Spindle command (after power is applied) to start the spindle motor.
If W3 is not installed (the factory default configuration), the drive automatically
starts the spindle motor at power-on. W3 is not installed for PC/AT installations.
W9 Bus Parity Option
W9 selects the parity check option. If W9 is installed, the drive neither generates
nor detects parity. If W9 is not installed (the factory default configuration), the drive
generates parity and enables parity detection. W9 is usually not installed for PC/AT
applications. Verify the correct configuration required by your Host Adapter.
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