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1670SPEC.TXT
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1989-10-03
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MICROPOLIS 1670 DISK DRIVE
SPECIFICATIONS
Model Number
Unformatted Capacity: 1673-4 1673-5 1674-6 1674-7
Total Mbytes 104.0 130.0 156.1 182.1
Disk Platters 3 3 4 4
Read/Write Heads 4 5 6 7
Cylinders ---------------- 1249 -----------------
Bytes per track -------------- 20,832 -----------------
Formatted Capacity
Total Mbytes 90.3 112.6 135.5 157.8
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-configured 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 37 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 Common Command Set
Write Precompensation Start Cylinder 1249
Reduced Write Current Start Cylinder 1249
Landing Zone 1249
Mounting Plane Any orientation
Power Requirements
+12V +/-5% 0.9A Avg
(2.0A max during start-up)
+5V +/-5% 1.0A avg
Power dissipation, typical 15 Watts
7. Drive Addressing and Interface Termination
_ID2
| _ID1
| | _ID0
| | | Pin 1
J2 | | | J1 | J3 (Power
____________ __________________________ ________connector on
_| |_| | |W14 W9| underside
| |____________| |__________________________|__| W3 | of board
| |
| W31 W2 W1 |
| +----------+ |
| | U39 | RN9 |
| | SCSI | |
| | PROM | |
| +----------+ |
| |
| |
| |
| 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 Terminator 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 select the source of terminator power (+5V) for the
interface terminator. 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 must 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.
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 usally not installed for PC/AT
applications. Verify the correct configuration required by your
Host Adapter.