RP04 disk drive
From Computer History Wiki
| RP04 | |
| Drive Controller(s): | RH11 (UNIBUS) |
|---|---|
| Capacity: | 88 Mbytes |
| Transfer Rate: | 2.5 usec/word |
| Revolutions per Minute: | 3600 |
| 1/2 Revolution Time: | 8.3 msec |
| One Track Seek Time: | 7 msec |
| Average Seek Time: | 28 msec |
| Maximum Seek Time: | 50 msec |
| Total Surfaces: | 19 |
| Tracks per Surface: | 411 |
| Sectors per Track: | 22 |
| Words per Sector: | 256 |
| Density: | 4040 bpi (maximum) |
| Recording Method: | Modified Frequence Modulation |
| Physical Size: | 31" W x 40" H x 32" L |
| Weight: | 600 pounds |
| Power Consumption: | 660 VA per phase (running); 3300 VA per phase (starting, 10 seconds max) |
The RP04 was the successor to the RP02 and RP03 multi-platter large disk drives. It used a pack compatible with the IBM 3336 pack, used on the IBM 3330 drive.
It was the first large drive to use the MASSBUS bus; thus, it did not have a specific device controller, but used the appropriate MASSBUS controller. A maximum of 8 drives were supported per controller.
