RP02 disk drive
From Computer History Wiki
| RP02 | |
 RP02 drive | |
| Manufacturer: | Memorex (basic drive), Digital Equipment Corporation (electronics) |
|---|---|
| Drive Controller(s): | RP10 (PDP-10) RP11 (UNIBUS) |
| Capacity: | 23.3 Mbytes (formatted), 29 Mbytes (raw) |
| Transfer Rate: | 7.4 usec/18-bit word |
| Average Access Time: | 62.5 msec |
| Revolutions per Minute: | 2400 |
| 1/2 Revolution Time: | 12.5 msec |
| One Track Seek Time: | 20 msec |
| Average Seek Time: | 50 msec |
| Maximum Seek Time: | 80 msec |
| Total Surfaces: | 20 (11 platters) |
| Tracks per Surface: | 203 (nominally 200 plus 3 spares) |
| Sectors per Track: | 10 |
| Words per Sector: | 256 18-bit |
| Density: | 2230 bpi (maximum) |
| Recording Method: | double frequency, NRZ |
| Physical Size: | 30" W x 39" H x 24" L |
| Weight: | 295 pounds |
| Power Consumption: | 1250 VA (running); 5200 VA (starting) |
The RP02 was the predecessor to the later RP03 multi-platter large disk drive.
The actual drive was produced by Memorex - a model 660-2a - and OEM'd by DEC, who added interface electronics.
A maximum of 8 drives were supported per controller.
Notes
a - There is some disagreement among sources; some claim it was a 660-1. There was apparently also a 660-0, which was a different version, rented out by Memorex; many were converted to 660-1's and sold to DEC.
