RM02/03 disk drive - Revision history

Jnc: /* External links */ +RM02/03 Disk Subsystem User's Guide; new cats

2023-08-15T15:08:41Z

‎External links: +RM02/03 Disk Subsystem User's Guide; new cats

Jnc: Fix VAX controllers

2022-05-28T12:14:44Z

Fix VAX controllers

Jnc: /* External links */ +RM02/03/05 handbook

2021-09-26T01:09:30Z

‎External links: +RM02/03/05 handbook

Jnc: +External links

2021-09-25T16:56:07Z

+External links

Jnc: +Registers

2020-11-04T17:02:29Z

+Registers

Jnc: +pack info

2020-11-04T13:52:24Z

+pack info

Jnc: Add more info

2020-11-03T17:57:11Z

Add more info

Jnc: Combine into one page

2020-10-30T08:01:26Z

Combine into one page

Jnc: Jnc moved page RM02 disk drive to RM02/03 disk drive: Better naming system

2020-10-30T07:58:28Z

Jnc moved page RM02 disk drive to RM02/03 disk drive: Better naming system

Jnc: Jnc moved page RM02 to RM02 disk drive: naming sys

2020-10-28T00:47:45Z

Jnc moved page RM02 to RM02 disk drive: naming sys

@@ Line 23: / Line 23: @@
 }}
-The '''RM02''' and '''RM03''' were [[MASSBUS]] multi-[[platter]] large  moving-[[head]] [[disk]] [[pack]] [[drive]]s. They were effectively identical, except that the RM03 rotated faster (3600 RPM, versus 2400 RPM for the RM02). The RM02 provided 806 KB/s transfers; the RM03 was 1200 KB/s transfers.
+The '''RM02''' and '''RM03''' were [[MASSBUS]] large [[removable-pack disk]]s. They were effectively identical, except that the RM03 rotated faster (3600 RPM, versus 2400 RPM for the RM02). The RM02 provided 806 KB/s transfers; the RM03 was 1200 KB/s transfers.
 Both supported both 15-bit and 18-bit [[word]]s; user data is protected by a 32-bit [[error-correcting code|ECC]] per [[sector]]. RM0x drives are dual-ported, allowing any drive to be attached to two different controllers. Generally a maximum of 8 drives were supported per [[device controller]].
-They both used 5-[[platter]] RM03P (type 9877) packs; neither side of the top and bottom platters were used, however - they were only there for protection. Of the other 6 surfaces, one was read-only,  pre-recorded by the manufacturer with servo information; the drive had the capability of seeking to a 200 μinch offset under command, to allow the attempted recovery of otherwise-unreadable data.
+They both used 5-[[platter]] RM03P (type 9877) [[pack]]s; neither side of the top and bottom platters were used, however - they were only there for protection. Of the other 6 surfaces, one was read-only,  pre-recorded by the manufacturer with servo information; the drive had the capability of seeking to a 200 μinch offset under command, to allow the attempted recovery of otherwise-unreadable data.
 ==Registers==
@@ Line 76: / Line 76: @@
 ** [http://www.bitsavers.org/pdf/dec/disc/rm03/EK-RM023-TD-001_RM02_03_Tech_May78.pdf RM02/03 Adapter Technical Description Manual]
 ** [http://bitsavers.org/pdf/dec/disc/rm05/RM05_Handbook.pdf RM02/03/05 handbook]
 * [http://www.bitsavers.org/pdf/dec/disc/rm05/EK-RMADA-TD-001_Oct80.pdf RM MASSBUS Adapter Technical Description Manual] (EK-RMADA-TD-001)
-[[Category: MASSBUS Devices]]
+[[Category: MASSBUS Disk Drives]]
-[[Category: DEC Disk Drives]]
+[[Category: DEC Removable-pack Disks]]

@@ Line 2: / Line 2: @@
 | name = RM02/RM03
 | manufacturer = [[Digital Equipment Corporation]]
-| controller = [[RH10 MASSBUS controller|RH10]] ([[PDP-10]])<br>[[RH20 MASSBUS controller|RH20]] ([[KL10]])<br>[[RH11 MASSBUS controller|RH11]] ([[UNIBUS]])<br>[[RH70 MASSBUS controller|RH70]] ([[PDP-11/70]])<br>[[RH780 MASSBUS controller|RH780]] ([[VAX-11/780]])<br>[[RH750 MASSBUS controller|RH750]] ([[VAX-11/750]])
+| controller = [[RH10 MASSBUS controller|RH10]] ([[PDP-10]])<br>[[RH20 MASSBUS controller|RH20]] ([[KL10]])<br>[[RH11 MASSBUS controller|RH11]] ([[UNIBUS]])<br>[[RH70 MASSBUS controller|RH70]] ([[PDP-11/70]])<br>[[RH780 Massbus Adapter|RH780]] ([[VAX-11/780]])<br>[[RH750 Massbus Adapter|RH750]] ([[VAX-11/750]])
 | capacity = 67 Mbytes
 | transfer rate = 2.48 μsec/word (RM02/16-bit)<br>2.79 μsec/word (RM02/18-bit)<br>1.65 μsec/word (RM03/16-bit)<br>1.86 μsec/word (RM03/18-bit)<br>

@@ Line 75: / Line 75: @@
 * [http://www.bitsavers.org/pdf/dec/disc/rm03/ RM02/03 Documents]
 ** [http://www.bitsavers.org/pdf/dec/disc/rm03/EK-RM023-TD-001_RM02_03_Tech_May78.pdf RM02/03 Adapter Technical Description Manual]
 * [http://www.bitsavers.org/pdf/dec/disc/rm05/EK-RMADA-TD-001_Oct80.pdf RM MASSBUS Adapter Technical Description Manual] (EK-RMADA-TD-001)
 [[Category: MASSBUS Devices]]
 [[Category: DEC Disk Drives]]

@@ Line 70: / Line 70: @@
 {{semi-stub}}
 [[Category: MASSBUS Devices]]
 [[Category: DEC Disk Drives]]

@@ Line 18: / Line 18: @@
 <!-- | density = 2200 bpi (maximum) -->
 | recording method = [[Modified Frequency Modulation|MFM]]
-| physical size = 33" W x 39" H x 21-5/8?" L
+| physical size = 21-5/8?" W x 39" H x 33" L
 | weight = 430 pounds
 <!-- | power consumption = 660 VA per phase (running); 3300 VA per phase(starting) -->
@@ Line 27: / Line 27: @@
 Both supported both 15-bit and 18-bit [[word]]s; user data is protected by a 32-bit [[error-correcting code|ECC]] per [[sector]]. RM0x drives are dual-ported, allowing any drive to be attached to two different controllers. Generally a maximum of 8 drives were supported per [[device controller]].
-They both used 5-[[platter]] RM03P (type 9877) packs; neither side of the top and bottom platters were used, however - they were only there for protection. Of the other 6 sides, one was read-only,  pre-recorded by the manufacturer with servo information; the drive had the capability of seeking to a 200 μinch offset under command, to allow the attempted recovery of otherwise-unreadable data.
+They both used 5-[[platter]] RM03P (type 9877) packs; neither side of the top and bottom platters were used, however - they were only there for protection. Of the other 6 surfaces, one was read-only,  pre-recorded by the manufacturer with servo information; the drive had the capability of seeking to a 200 μinch offset under command, to allow the attempted recovery of otherwise-unreadable data.
 {{semi-stub}}

@@ Line 1: / Line 1: @@
-The '''RM02''' was a 67MB [[MASSBUS]] [[disk]] [[pack]] [[drive]], 806 KB/s transfers, 42.5 ms average access time, 6 ms [[track]]-to-track [[seek]] time, 2400 rpm
+The '''RM02''' and '''RM03''' were 67MB [[MASSBUS]] [[disk]] [[pack]] [[drive]]s. The RM02 had 806 KB/s transfers, 42.5 ms average access time, 6 ms [[track]]-to-track [[seek]] time, 2400 RPM; the RM03 had 1200 KB/s transfer, 38.3 ms average access time, 6 ms track-to-track seek time, 3600 RPM.
-−
 {{stub}}
 [[Category: MASSBUS Devices]]
 [[Category: DEC Disk Drives]]

← Older revision	Revision as of 07:58, 30 October 2020
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← Older revision	Revision as of 00:47, 28 October 2020
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