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- MICROPOLIS 1684 DISK DRIVE
- SPECIFICATIONS
-
- Model Number
- Unformatted Capacity: 1684-7
-
- Total Mbytes --------------- 389.3 -----------------
- Disk Platters ------------------- 4 -----------------
- Read/Write Heads ------------------ 7 -----------------
- Cylinders --------------- 1780 -----------------
- Bytes per track -------------- 31,248 -----------------
-
- Formatted Capacity
-
- Total Mbytes --------------- 339.6 -----------------
- Bytes per Sector ----------------- 512 -----------------
- Sectors per Track ----------------- 54 -----------------
-
- PC Setup
-
- 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 4 msec
- Average 14 msec
- Maximum 30 msec
- Average Rotational Latency 8.33 msec
- Rotational Speed 3600 rpm +/- 0.5%
- Data Transfer Rate at Interface
- Synchronous 4.0 Mbytes/sec
- Asynchronous 1.6 Mbytes/sec
- Internal Data Rate 15 Mbits/sec
- MTBF 150,000 hours
- Positioner Fully balanced rotary voice coil
- Parking Automatic park and lock
-
- General Functional Specifications
-
- Interface SCSI
- Supports Common Command Set
- Write Precompensation Start Cylinder 1780
- Reduced Write Current Start Cylinder 1780
- Landing Zone 1780
- Mounting Plane Any orientation
-
- Power Requirements
-
- +12V +/-5% 0.9A Avg
- (2.0A max during start-up)
- +5V +/-5% 0.8A avg
- Power dissipation, typical 14.8 Watts
-
- 7. Drive Addressing and Interface Termination
-
-
- _ID2
- | _ID1
- | | _ID0
- | | | Pin 1
- J2 | | | J1 | J3 (Power
- ___________ __________________________ ________under
- _| | | | |W14 W9 | board
- | |___________|_ |__________________________|___| W3 |
- | |
- | W31 W2 W1 |
- | |
- | RN9 |
- | |
- | |
- | |
- | |
- | |
- | |
- | 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 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 PC/AT
- applications.
-
- 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.