RA80 Disk Drive - Revision history

Jnc: New cat

2023-08-31T01:16:55Z

New cat

2023-08-18T19:29:00Z

‎External links: use Bitsavers copy

2023-08-16T13:45:39Z

Add infobox; some description; manual

2023-08-16T12:30:38Z

Jnc moved page RA80 to RA80 Disk Drive: Formal DEC name

2023-08-14T16:13:55Z

New cat

2022-08-20T20:07:50Z

Two links added

2015-01-20T14:15:58Z

Information taken from http://www.museumwaalsdorp.nl/computer/en/decequip.html and archive.org

2011-08-06T18:47:46Z

2011-05-04T13:43:58Z

2011-05-04T12:35:24Z

Created page with "121 MB SDI HD {{stub}}"

New page

121 MB SDI HD
{{stub}}

@@ Line 53: / Line 53: @@
 * [http://bitsavers.org/pdf/dec/disc/brochure/RA60_RA80_And_RA81_Disk_Drives_Brochure_Aug82.pdf The RA60, RA80 and RA81 Disk Drives and The Digital Storage Architecture] - brochure
-[[Category: MSCP Disk Drives]]
+[[Category: SDI Disk Drives]]
 [[Category: DEC Non-removable-media Disks]]

@@ Line 51: / Line 51: @@
 * [http://bitsavers.org/pdf/dec/disc/ra80/ ra80] - documentation at [[Bitsavers]]
 ** [http://bitsavers.org/pdf/dec/disc/ra80/EK-0RA80-UG-001_UsersGuide_Jan82.pdf RA80 Disk Drive User Guide] (EK-0RA80-UG-001)
-* [https://archive.org/details/bitsavers_decdiscRA6vesBrochureAug82_2235969 RA80/RA81 sales brochure]
+* [http://bitsavers.org/pdf/dec/disc/brochure/RA60_RA80_And_RA81_Disk_Drives_Brochure_Aug82.pdf The RA60, RA80 and RA81 Disk Drives and The Digital Storage Architecture] - brochure
 [[Category: MSCP Disk Drives]]
 [[Category: DEC Non-removable-media Disks]]

@@ Line 1: / Line 1: @@
-[[Image:ra80.jpg|thumb|200px|right|RA 80]]
+{{Infobox Disk drive
-MB [[SDI]] [[Winchester disk]]
+| name = RA80
-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.
+[[Image:ra80.jpg|thumb|200px|left|RA80]]
-A combined RA80/[[RA81]] [https://archive.org/details/bitsavers_decdiscRA6vesBrochureAug82_2235969 sales brochure is now online @ archive.org].
+The '''RA80 Disk Drive''' is a [[Standard Disk Interconnect]] [[non-removable-media disk]] drive from [[Digital Equipment Corporation|DEC]]. A physically large drive (14-inch platters, in a heavy enclosure 10.5" x 16" x 36"), its capacity was 121 Mbytes.
-= 4.3 BSD disktab =
+It had two heads per surface; not rotationally opposed (to halve maximum access time), but two on each arm; there thus 1,092 usable tracks on each surface. It was internally operated by a [[microprocessor]] which used 32-bit burst [[error-correcting code|ECC]] to invisibly repair simple data errors.
 <pre>
 a80|RA80|DEC RA80 Winchester:\
@@ Line 16: / Line 45: @@
 </pre>
-[[Category:MSCP Disk Drives]]
+{{semi-stub}}

@@ Line 1: / Line 1: @@
 [[Image:ra80.jpg|thumb|200px|right|RA 80]]
-MB SDI HD
+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.

← Older revision	Revision as of 12:30, 16 August 2023
(No difference)