RM02/03 disk drive - Revision history

Jnc: /* External links */ Manx mirror of Antonio's stuff is gone

2026-10-11T20:45:40Z

External links: Manx mirror of Antonio's stuff is gone

← Older revision		Revision as of 20:45, 11 October 2026
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	** [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/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://bitsavers.org/pdf/dec/disc/rm05/RM05_Handbook.pdf RM02/03/05 handbook]
	* [https://manx-docs.org/collections/antonio/arc-db/EK-RM02-UG-002.pdf RM02/03 Disk Subsystem User's Guide] (EK-RM02-UG-002)		* [https://web.archive.org/web/20250606230735/https://manx-docs.org/collections/antonio/arc-db/EK-RM02-UG-002.pdf RM02/03 Disk Subsystem User's Guide] (EK-RM02-UG-002)
	* [http://www.bitsavers.org/pdf/dec/disc/rm05/EK-RMADA-TD-001_Oct80.pdf RM MASSBUS Adapter Technical Description Manual] (EK-RMADA-TD-001)		* [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 Disk Drives]]		[[Category: MASSBUS Disk Drives]]
	[[Category: DEC Removable-pack Disks]]		[[Category: DEC Removable-pack Disks]]

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

← Older revision		Revision as of 15:08, 15 August 2023
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	}}		}}

	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]].		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==		==Registers==
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	** [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/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://bitsavers.org/pdf/dec/disc/rm05/RM05_Handbook.pdf RM02/03/05 handbook]
			* [https://manx-docs.org/collections/antonio/arc-db/EK-RM02-UG-002.pdf RM02/03 Disk Subsystem User's Guide] (EK-RM02-UG-002)
	* [http://www.bitsavers.org/pdf/dec/disc/rm05/EK-RMADA-TD-001_Oct80.pdf RM MASSBUS Adapter Technical Description Manual] (EK-RMADA-TD-001)		* [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]]

Jnc: Fix VAX controllers

2022-05-28T12:14:44Z

Fix VAX controllers

← Older revision		Revision as of 12:14, 28 May 2022
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	\| name = RM02/RM03		\| name = RM02/RM03
	\| manufacturer = [[Digital Equipment Corporation]]		\| 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		\| 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>		\| 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>

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

2021-09-26T01:09:30Z

External links: +RM02/03/05 handbook

← Older revision		Revision as of 01:09, 26 September 2021
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	* [http://www.bitsavers.org/pdf/dec/disc/rm03/ RM02/03 Documents]		* [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/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)		* [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 Devices]]
	[[Category: DEC Disk Drives]]		[[Category: DEC Disk Drives]]

Jnc: +External links

2021-09-25T16:56:07Z

+External links

← Older revision		Revision as of 16:56, 25 September 2021
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	{{semi-stub}}		{{semi-stub}}

			==External links==

			* [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: MASSBUS Devices]]
	[[Category: DEC Disk Drives]]		[[Category: DEC Disk Drives]]

Jnc: +Registers

2020-11-04T17:02:29Z

+Registers

@@ 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}}

Jnc: +pack info

2020-11-04T13:52:24Z

+pack info

← Older revision		Revision as of 13:52, 4 November 2020
Line 18:		Line 18:
	<!-- \| density = 2200 bpi (maximum) -->		<!-- \| density = 2200 bpi (maximum) -->
	\| recording method = [[Modified Frequency Modulation\|MFM]]		\| recording method = [[Modified Frequency Modulation\|MFM]]
	\| physical size = 33" W x 39" H x ??" L		\| physical size = 33" W x 39" H x 21-5/8?" L
	\| weight = 430 pounds		\| weight = 430 pounds
	<!-- \| power consumption = 660 VA per phase (running); 3300 VA per phase(starting) -->		<!-- \| power consumption = 660 VA per phase (running); 3300 VA per phase(starting) -->
	}}		}}

	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). ~~Both supported both 15-bit and 18-bit [[word]]~~s; ~~user data is protected by a 32-bit [[error-correcting code\|ECC]] per [[sector]]~~.		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.

	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]].		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]].

	~~The RM02 provided 806 KB/s transfers~~; the ~~RM03~~ had ~~1200 KB/s transfer~~.		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.

	{{semi-stub}}		{{semi-stub}}

Jnc: Add more info

2020-11-03T17:57:11Z

Add more info

@@ Line 1: / Line 1: @@
-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.
+{{Infobox Disk drive
+| name = RM02/RM03
-{{stub}}
+| manufacturer = [[Digital Equipment Corporation]]
 [[Category: MASSBUS Devices]]
 [[Category: DEC Disk Drives]]

Jnc: Combine into one page

2020-10-30T08:01:26Z

Combine into one page

← Older revision		Revision as of 08:01, 30 October 2020
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}}		{{stub}}

	[[Category: MASSBUS Devices]]		[[Category: MASSBUS Devices]]
	[[Category: DEC Disk Drives]]		[[Category: DEC Disk Drives]]

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

← Older revision		Revision as of 07:58, 30 October 2020
(No difference)