Difference between revisions of "RA90 disk drive"
From Computer History Wiki
(Basic RA90 data) |
m (New cat) |
||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
| − | 1.216 GB (formatted) | + | The '''RA90 disk drive''' was a 1.216 GB (formatted) [[Standard Disk Interconnect]] [[non-removable-media disk]] from [[Digital Equipment Corporation|DEC]]. |
| + | |||
| + | ==Specifications== | ||
* 2,649 User Cylinders | * 2,649 User Cylinders | ||
| Line 10: | Line 12: | ||
{{stub}} | {{stub}} | ||
| − | [[Category: | + | ==External links== |
| + | |||
| + | * [http://www.vaxhaven.com/images/4/42/EK-ORA90-UG-002.pdf RA90/RA92 Disk Drive User Guide] (EK–ORA90–UG–002) | ||
| + | * [http://bitsavers.org/pdf/dec/disc/ra90/EK-ORA90-SV-003_RA90_RA92_Service_Jun90.pdf RA90/RA92 Disk Drive Service Manual] (EK-ORA90-SV-003) | ||
| + | * [http://www.vaxhaven.com/images/8/81/EK-RA90H-IN-002.pdf RA90/RA92/H9643 Cabinet Installation Guide] (EK-RA90H-IN-002) | ||
| + | * ''Disk Drive Technology Improvements in the RA90'', in [[Digital Technical Journal|DTJ]] [http://www.dtjcd.vmsresource.org.uk/pdfs/dtj_v01-08_feb1989.pdf Number 8, February 1989] (pp. 48-62) | ||
| + | |||
| + | [[Category: SDI Disk Drives]] | ||
| + | [[Category: DEC Non-removable-media Disks]] | ||
Latest revision as of 03:13, 31 August 2023
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)
