RA90 disk drive
From Computer History Wiki
The RA90 disk drive was a 1.216 GB (formatted) Standard Disk Interconnect non-removable-media disk from DEC.
Specifications
- 2,649 User Cylinders
- 14 Heads (13 data + 1 servo)
- 69 Sectors (+ 1 spare)
- 2,376,153 User Blocks
- 19 ms Average Seek
- 8.33 ms Average Latency
External links
- RA90/RA92 Disk Drive User Guide (EK–ORA90–UG–002)
- RA90/RA92 Disk Drive Service Manual (EK-ORA90-SV-003)
- RA90/RA92/H9643 Cabinet Installation Guide (EK-RA90H-IN-002)
- Disk Drive Technology Improvements in the RA90, in DTJ Number 8, February 1989 (pp. 48-62)
