Micropolis 1373
Hard Disk Drive
Overview
| Model | Capacity | Size | Height | Interface | Bus Type |
|---|---|---|---|---|---|
| Micropolis 1373 | 73MB | 5.25" | FHT | SE | SCSI1 |
Specifications
| Size | 5-1/4" |
| Interface | SCSI |
| Interface Type | |
| Encoding Method | |
| Formatted Capacity | 72.9 MB |
| Disks | 3 |
| Heads | 4 |
| Cylinders | 1024 |
| Sectors | *36 |
| Buffer Size | N/A |
| Average Seek | 23 msec |
| Single Track | 5 msec |
| Rotation Speed/Avg. Latency | 3600 rpm +/- 0.5% |
| Transfer Rate to / from. media | 1.6 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 | 2.0A (max) | ||
| Read / Write | 4.25A avg | 2.0A avg | |
| Typical | 35 Watts |
Notes
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. RN1, RN7, RN8 Interface Terminators The Interface Terminators factory installed at RN1, RN7, and RN8 provide proper termination for the interface lines. When daisy-chaining multiple drives, leave the terminators installed only in the last physical drive on the daisy chain cable; remove all three terminators from each of the other drives. In most PC/AT installations, the C: drive is actually at the end of the cable and should retain the terminators. W1, W2 Terminator Option W1 and W2 select the source of terminator power (+5V) for the interface terminators. If a jumper is installed at W1 and no jumper is installed at W2 (the factory default configuration), the drive provides terminator power. This configuration is used for PC/AT applications. If no jumper is installed at W1 but a jumper is installed at W2, terminator power is provided by the host computer system via interface connector J1, pin 26. 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. W18 Bus Parity Option W18 selects the parity check option. If W18 is installed, the drive neither generates nor detects parity. If W18 is not installed (the factory default configuration), the drive generates parity and enables parity detection. W18 is not installed most PC/AT applications. Refer to your host adapter's requirements to verify if parity is to be disabled. Note: W18 is labeled "W9" on some 137x boards. |
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