Micropolis hard Disk Drives, Specifications, Support, Specs, Jumpers, Manual, Images

Micropolis 4743WS

Hard Disk Drive


Model Capacity Size Height Interface Bus Type
Micropolis 4743WS 4300MB 3.5" SL W SCSI3

This drive is from the 4743 "Stinger" model family.


Size 3 1/2" 
Interface SCSI-3
Interface Type Wide, Single-Ended, 68 Unitized Pin
Encoding Method
Formatted Capacity 4.3 GB
Cylinders 6807
Sectors 512
Buffer Size N/A
Average Seek 10.5 msec
Single Track
Rotation Speed/Avg. Latency 5400 rpm +/- 0.5%
Transfer Rate to / from. media 20 Mbytes/sec  Synchronous
Transfer Rate to / from buffer
Tracks Per Inch (TPI)
Bits Per Inch (BPI)
Dimensions 5.75"D x 4.0"W x 1.0"H
Weight 1.4 lbs.

Power Requirements

+12V +/-5% +5V +/-5% Power
Spin up .3A
Read / Write 1.7A .4A
Typical seeking     6 Watts


Configuration and Jumper Options

Front View

Remote LED
Open-collector output - Used to drive a user-supplied LED
to indicate the drive is active. SCSI ID
Jumpers at Pin 3-4, 5-6, 7-8, and 9-10 select the SCSI ID.  Each SCSI device on one Host Adapter must have a unique SCSI ID (0-15). 
SCSI ID0 is the Default.

0 out out out out
1 out out out in
2 out out in out
3 out out in in
4 out in out out
5 out in out in
6 out in in out
7 out in in in
8 in out out out
9 in out out in
10 in out in out
11 in out in in
12 in in out out
13 in in out in
14 in in in out
15 in in in in

Spindle Control (SP0)
Jumper installed at SP0, jumper omitted at SP1 - The spindle motor starts when SCSI 'START UNIT' command is received.
Jumpers omitted at SP0 (Default) and at SP1 - The spindle motor starts at power-on. 

Spindle Delay (SP1)
Jumper installed at SP1, jumper omitted at SP0 Spindle motor start-up is delayed, based on SCSI ID (12 seconds per SCSI ID). 
Jumpers omitted at SP1 (Default) and at SP0 - The spindle motor starts at power-on.

Write Protect (WP)
Jumper installed at WP - The drive is write protected. 
Jumper omitted at WP (Default) - The drive is not write protected.

BUS Parity Check (PTY)
Jumper installed at PTY - The drive neither generates nor detects parity. 
Jumper omitted at PTY (Default) - The drive generates parity and has parity detection enabled.

Terminator Power (W1, W2, W3)
Jumper installed at W1 (Default) - The drive provides terminator power.
Jumper installed at W2 - The host provides terminator power (via Interface Connector J1A). 
Jumper installed at W3 (Default) - The drive provides terminator power (via J1A) to the SCSI Bus.

Interface Termination (W4)
Jumper installed at W4 (Default) - The drive provides termination for the interface lines; onboard termination is electrically enabled. 
Jumper omitted at W4 - The drive does not provide termination for the interface lines; onboard termination is electrically disabled.