RP03 disk drive
From Computer History Wiki
| RP03 | |
| Manufacturer: | Sperry Univac ISS (basic drive), Digital Equipment Corporation (electronics) |
|---|---|
| Drive Controller(s): | RP11 (UNIBUS) |
| Capacity: | 41 Mbytes |
| Transfer Rate: | 7.5 usec/word |
| Average Access Time: | 41.5 msec |
| Revolutions per Minute: | 2400 |
| 1/2 Revolution Time: | 12.5 msec |
| One Track Seek Time: | 7.5 msec |
| Average Seek Time: | 29 msec |
| Maximum Seek Time: | 55 msec |
| Total Surfaces: | 20 |
| Tracks per Surface: | 406 (nominally 400 plus 6 spares; many systems used all 406, as reliability was high) |
| Sectors per Track: | 10 |
| Words per Sector: | 256 |
| Density: | 2200 bpi (maximum) |
| Recording Method: | double frequency, NRZ |
| Physical Size: | 30" W x 40" H x 24" L |
| Weight: | 315 pounds |
| Power Consumption: | 660 VA per phase (running); 3300 VA per phase(starting) |
The RP03 was the successor to the earlier RP02 multi-platter large disk drive.
The actual drive was produced by the Information Storage Systems (ISS) division of Sperry Univac, and OEM'd by DEC, who added interface electonics.
A maximum of 8 drives were supported per controller.
