RP03 disk drive
From Computer History Wiki
(Redirected from RP03 Disk drive)
RP03 | |
RP03 drive | |
Manufacturer: | Sperry Univac ISS (basic drive), Digital Equipment Corporation (electronics) |
---|---|
Drive Controller(s): | RP10 (PDP-10) RP11 (UNIBUS) |
Capacity: | 41 Mbytes |
Transfer Rate: | 7.5 μsec/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, and the predecessor to the later RP04.
The actual drive was produced by the Information Storage Systems (ISS) division of Sperry Univac , a model 715, and OEM'd by DEC, who added interface electronics.
A maximum of 8 drives were supported per device controller.
See also
External links
- Information Storage Systems schematics
- 715 - ISS 715 documentation at Bitsavers
- Sperry RP03 - includes many images of the interior