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- Micropolis 1370 Series Disk Drives
- SPECIFICATIONS
-
- Drive Model Number
- Unformatted Capacity: 1373 1373A 1374 1374A 1375
-
- Total Mbytes 85.3 106.6 127.9 149.3 170.6
- Disk Platters 3 3 4 4 5
- Read/Write Heads 4 5 6 7 8
- Cylinders ------------------ 1024 ------------------
- Bytes per track ---------------- 20,832 ------------------
-
- Formatted Capacity
-
- Total Mbytes 72.9 91.2 109.4 127.6 145.9
- Bytes per Sector ------------------- 512 ------------------
- Sectors per Track -------------------- 36 ------------------
-
- PC Drive Types
-
- When using SCSI in a PC, the most common method is to run your
- setup program and define No Drives Present. The SCSI Host Adapter
- will automatically self-configure on power-up. To install the
- drive, follow the manufacturer's instructions to use the on-board
- BIOS routine or software that was supplied with the Host Adapter.
-
- Performance Specifications
-
- Seek Time (including settling time) Track-to-Track 5 msec
- Average 23 msec
- Maximum 50 msec
- Average Rotational Latency 8.33 msec
- Rotational Speed 3600 rpm +/- 0.5%
- Data Transfer Rate at Interface
- Asynchronous 1.6 Mbytes/sec
- MTBF 30,000 hours
- Positioner Fully balanced rotary voice coil
- Parking Automatic park and lock
-
- General Functional Specifications
-
- Interface SCSI
- Supports Common Comman Set
- Write Precompensation Start Cylinder 1024
- Reduced Write Current Start Cylinder 1024
- Landing Zone 1024
- Mounting Plane Any orientation
-
- Power Requirements
-
- +12V +/-5% 2.0A avg
- (4.25A max during start-up)
- +5V +/-5% 2.0A avg
- Power dissipation, typical 35 Watts
-
- Drive Addressing and Interface Termination
-
- ID2___
- ID1__ | __W3
- PIN 1 ID0_ ||| _W18 or W9
- | |||||
- ____________________________________________________________
- | | J1 || J2 | |
- | |________________________________||______________| |
- |W1 W2 ==RN1=== ==RN7== ==RN8=== |
- | |
- | |
- | |
- | |
- | |
- | |
- | |
- | (Component Side) |
- | |
- | |
- | |
-
- 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 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 in in in
-
- For multiple drive installations, on one Host Adapter,each drive
- must 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.
-