Difference between revisions of "RA80 Disk Drive"
From Computer History Wiki
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[[Image:ra80.jpg|thumb|200px|right|RA 80]] | [[Image:ra80.jpg|thumb|200px|right|RA 80]] | ||
| − | 121 MB SDI | + | 121 MB [[SDI]] [[Winchester disk]] |
This physically large drive (14-inch platters, in a heavy enclosure 10.5" x 16" x 36") 1.2 MB/s peak transfer rate; 33.3 ms average access time; 25 ms average seek time; track-to-track seek time 6 ms; 8.33 ms latency; 3600 rpm; seven data and 1 servo disk surfaces; 1,092 tracks/surface; 31 sectors/track (16 bit words); 512 bytes/sector. | This physically large drive (14-inch platters, in a heavy enclosure 10.5" x 16" x 36") 1.2 MB/s peak transfer rate; 33.3 ms average access time; 25 ms average seek time; track-to-track seek time 6 ms; 8.33 ms latency; 3600 rpm; seven data and 1 servo disk surfaces; 1,092 tracks/surface; 31 sectors/track (16 bit words); 512 bytes/sector. | ||
Revision as of 21:07, 20 August 2022
121 MB SDI Winchester disk
This physically large drive (14-inch platters, in a heavy enclosure 10.5" x 16" x 36") 1.2 MB/s peak transfer rate; 33.3 ms average access time; 25 ms average seek time; track-to-track seek time 6 ms; 8.33 ms latency; 3600 rpm; seven data and 1 servo disk surfaces; 1,092 tracks/surface; 31 sectors/track (16 bit words); 512 bytes/sector.
A combined RA80/RA81 sales brochure is now online @ archive.org.
4.3 BSD disktab
a80|RA80|DEC RA80 Winchester:\ :ty=winchester:ns#31:nt#14:nc#559:\ :pa#15884:ba#8192:fa#1024:\ :pb#33440:pc#242606:\ :pg#82080:bg#4096:fg#512:\ :ph#111202:bh#4096:fh#1024:
