RA60 Disk Drive - Revision history

Jnc: New sub-cat

2023-08-31T08:36:12Z

New sub-cat

Jnc: Not really a Winchester drive

2023-08-18T20:37:56Z

Not really a Winchester drive

Jnc: In DSA family; add 16/18 capability, many stats

2023-08-18T15:05:00Z

In DSA family; add 16/18 capability, many stats

Jnc: /* External links */ +brochure

2023-08-18T14:42:06Z

‎External links: +brochure

Jnc: +month

2023-08-18T14:30:21Z

+month

Jnc: /* External links */ +DEC RA60 disk drives - CHM

2023-08-16T21:00:02Z

‎External links: +DEC RA60 disk drives - CHM

Jnc: Jnc moved page RA60 to RA60 Disk Drive: Formal DEC name

2023-08-16T00:53:21Z

Jnc moved page RA60 to RA60 Disk Drive: Formal DEC name

Jnc: Add some more details; manuals

2023-08-16T00:52:58Z

Add some more details; manuals

Vaxorcist: Changed link to SDI controllers, and added citation

2023-08-15T06:38:01Z

Changed link to SDI controllers, and added citation

Jnc: +New cat

2023-08-14T22:16:57Z

+New cat

@@ Line 65: / Line 65: @@
 * [https://www.computerhistory.org/collections/catalog/102733609 DEC RA60 disk drives]
-[[Category: MSCP Disk Drives]]
+[[Category: SDI Disk Drives]]
 [[Category: DEC Removable-pack Disks]]

@@ Line 37: / Line 37: @@
 ''The RA60 is the industry's highest capacity and lowest price-per-megabyte rack mounted, removable media disk. With 205 megabytes of user formatted capacity, 615 megabytes are available in a 42-inch high cabinet - 50% more than any other removable media product. The RA60 provides 205 megabytes of removable media flexibility for $15,000.''
 ==4.3 BSD disktab==
@@ Line 58: / Line 60: @@
 ** [http://bitsavers.org/pdf/dec/disc/ra60/EK-0RA60-SV-001_May83.pdf RA60 Disk Drive Service Manual] (EK-0RA60-SV-001l
 * [http://bitsavers.org/pdf/dec/brochures/DEC-RA60-205MB-RemovableMediaDiskDrive.pdf RA60 205-Mbyte Removable-Media Disk Drive] - brochure
 * [https://manx-docs.org/collections/hcps/m880btc.pdf RA60 Maintenance Guide] (AA-M88OB-TC)
 * [https://www.computerhistory.org/collections/catalog/102733609 DEC RA60 disk drives]

@@ Line 4: / Line 4: @@
 | year introduced = June, 1982
 | controller = [[Standard Disk Interconnect#SDI Family of DSA Products|all SDI controllers]]
-| capacity = 205 Mbytes (formatted)
+| capacity = 205 Mbytes (16-bit mode, formatted)<br>208 Mbytes (18-bit mode, formatted)
 | transfer rate = 1.3 Mbytes/sec
-| average access time = 50 msec
+| average access time = 50.3 msec
-| rpm = 3600 1/min
+| rpm = 3600
 | one track seek = 6.7 msec
 | average seek = 41.7 msec
 }}
 [[Image:open ra60.jpg|thumb|200px|left|An open RA60]]
-The '''RA60 Disk Drive''' is a [[Digital Equipment Corporation|DEC]] [[Standard Disk Interconnect|SDI]] [[removable-pack disk]] drive, introduced in 1982. It is the only removable-pack drive in the RAxx group of drives; the others ([[RA70]], etc) are all [[non-removable-media disk]] drives.
+The '''RA60 Disk Drive''' is a [[Digital Equipment Corporation|DEC]] [[Standard Disk Interconnect|SDI]] [[removable-pack disk]] drive, introduced in 1982; it could support either 16- or 18-bit words. It is the only removable-media drive in the RAxx group of drives; the others ([[RA70]], etc) are all [[non-removable-media disk]] drives. It is member of the [[Digital Storage Architecture]] family.
 It uses the RA60-P [[pack]], which has a five platters, with six data surfaces; the two end platters are purely protective. Track servo information is pre-recorded on the data surfaces; the servo information is recorded at manufacturing time.
@@ Line 33: / Line 47: @@
      :ph#268772:bh#4096:fh#1024:
 </pre>
 ==Further reading==

@@ Line 45: / Line 45: @@
 * [http://bitsavers.org/pdf/dec/disc/ra60/ ra60] - documentation at [[Bitsavers]]
 ** [http://bitsavers.org/pdf/dec/disc/ra60/EK-0RA60-SV-001_May83.pdf RA60 Disk Drive Service Manual] (EK-0RA60-SV-001l
 * [https://manx-docs.org/collections/hcps/m880btc.pdf RA60 Maintenance Guide] (AA-M88OB-TC)
 * [https://www.computerhistory.org/collections/catalog/102733609 DEC RA60 disk drives]

@@ Line 2: / Line 2: @@
 | name = RA60
 | manufacturer = [[Digital Equipment Corporation]]
-| year introduced = 1982
+| year introduced = June, 1982
 | controller = [[Standard Disk Interconnect#SDI Family of DSA Products|all SDI controllers]]
 | capacity = 205 Mbytes (formatted)

← Older revision	Revision as of 00:53, 16 August 2023
(No difference)

@@ Line 3: / Line 3: @@
 | manufacturer = [[Digital Equipment Corporation]]
 | year introduced = 1982
-| controller = all [[SDI controllers]]
+| controller = [[Standard Disk Interconnect#SDI Family of DSA Products|all SDI controllers]]| capacity = 205 Mbytes (formatted)
 | transfer rate = 1.3 Mbytes/sec
 | average access time = 50 msec
@@ Line 11: / Line 10: @@
 | average seek = 41.7 msec
 }}
 [[Image:open ra60.jpg|thumb|200px|right|An open RA60]]
 = 4.3 BSD disktab =

← Older revision		Revision as of 22:16, 14 August 2023
Line 26:		Line 26:
	</pre>		</pre>

−	[[Category:MSCP Disk Drives]]	+	[[Category: MSCP Disk Drives]]
		+	[[Category: DEC Removable-pack Disks]]