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- MICROPOLIS 1578 DISK DRIVE
- SPECIFICATIONS
-
- Model Number
- Unformatted Capacity: 1578-15
-
- Total Mbytes ---------------- 382.3 ---------------------
- Disk Platters -------------------- 8 ---------------------
- Read/Write Heads ------------------- 15 ---------------------
- Cylinders ----------------- 1224 ---------------------
- Bytes per track --------------- 20,832 ---------------------
-
- Formatted Capacity (typical)
-
- Total Mbytes ---------------- 331.7 ---------------------
- Bytes per Sector ------------------ 512 ---------------------
- Sectors per Track ------------------- 36 ---------------------
-
- 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 16 msec
- Maximum 35 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 10 Mbits/sec
- MTBF 150,000 hours
- Positioner Fully balanced rotary voice coil
- Parking Automatic park and lock
-
- General Functional Specifications
-
- Interface SCSI
- Supports Full Common Command Set
- Write Precompensation Start Cylinder 1224
- Reduced Write Current Start Cylinder 1224
- Landing Zone 1224
- Mounting Plane Any orientation
-
- Power Requirements
-
- +12V +/-5% 2.25A avg
- (4.25A max during start-up)
- +5V +/-5% 2.0A avg
- Power dissipation, typical 32 Watts
-
- Drive Addressing and Interface Termination
-
- PIN 1
- J2 J1 |
- ____________ _______________________________ J3
- __| |_| |___________
- | |____________| |_______________________________| | POWER |
- | RN202 RN203 RN204 |_________|
- | |
- | |
- | ... W201 |
- | 123 |
- | |
- | W5 |
- | W4 |
- | (Component Side) W20 |
- | ID0 |
- | ID1 |
- | ID2 |
- | |
-
-
- ____ ID2
- | ___ ID1
- || __ ID0 PIN 1
- J2 ||| J1 |
- ____________ _______________________________ J3
- __| |_| |___________
- | |____________| |_______________________________| | POWER |
- | RN202 RN203 RN204 |_________|
- | W4 W5 |
- | W21 |
- | W1 W2 |
- | |
- | W11 |
- | |
- | W20 |
- | (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.
-
- RN202, RN203, RN204 Interface Terminator
- The Interface Terminators factory installed at RN202, RN203, and
- RN204 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.
-
- W201 or W1, W2 Terminator Options
- W201 positions 1-2 and 2-3 (or W1 and W2, respectively, on second
- board shown) select the source of terminator power (+5V) for the
- interface terminators. If a jumper is installed at positions 1-2
- (W1) and no jumper is installed at position 2-3(W2)(the factory
- default configuration), the drive provides terminator power. This
- configuration is used for PC/AT applications. If no jumper is
- installed at W201 position 1-2(W1) but a jumper is installed at
- position 2-3(W2), terminator power must be provided by the host
- computer system via interface connector J1, pin 26.
-
- W11 Bus Option
- W11 (only present on Rev C and higher boards of the second type
- shown) allows the drive to supply interface terminator power to
- the SCSI Bus. If W11 is not installed (the factory default
- configuration), the drive does not supply SCSI bus interface
- terminator power. W11 should not be installed for PC/AT
- applications.
-
- W5 Spindle Option
- W5 selects the spindle control option. If W5 is installed, the
- drive waits for a Start Spindle command (after power is applied)
- to start the spindle motor. If W5 is not installed (the factory
- default configuration), the drive automatically starts the
- spindle motor at power-on. W5 is not installed for PC/AT
- installations.
-
- W4 Bus Parity Check Option
- W4 selects the parity check option. If W4 is installed, the drive
- neither generates nor detects parity. If W4 is not installed (the
- factory default configuration), the drive generates parity and
- enables parity detection. W4 is not installed most PC/AT
- applications. Verify the correct configuration required by your
- Host Adapter.
-
- W21 Ground Options
- W21(only implemented on Rev C and higher boards of the second
- type shown) is used to connect the drive's logic ground to frame
- ground. The factory default configuration, which should be used
- for PC/AT applications, is a jumper installed at W21.
-
- W20 Reserved
- Jumper must be installed
