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

Micropolis 1203-1

Hard Disk Drive


Model Capacity Size Height Interface Bus Type
Micropolis 1203-1 35MB 8" FHT ANSI MFM



Size 8"
Interface ANSI
Interface Type proprietary
Encoding Method MFM
Formatted Capacity 35MB
Platters 3
Heads 5
Cylinders 580
Sectors 13
Rotation Speed/Avg. Latency 3600 rpm +/- 0.5%
Average Seek 42 msec (avg.), 12ms min, 85ms max
Average Latency 8.3ms
Transfer Rate 0.92MB / sec
Average Read (seek+latency+sector time) 51.6ms
Dimensions 14.25"L x 8.55"W x 4.62"H
Weight 21 lbs.

Power Requirements

+24V +/-5% -12V +/-5% +5V +/-5% Power
Typical 29 Watts
Rated input power 110 Watts


The Micropolis 1203-1 hard disk drive is a full height 8-inch storage device. Designed in 1979 and introduced in 1982, they represent a first step in Micropolis' early storage solutions. The actual platter containment is of lower height, making space for a controller board sandwiched on top while fitting the 8 inch Shugart mounting slot. Note that the drives in this series all have a proprietary ANSI inferface.