RK05 disk drive - Revision history

Jnc: +New cat

2023-08-14T22:30:26Z

+New cat

Jnc: /* Images */ +Prefilter frame backside

2022-04-11T12:43:16Z

‎Images: +Prefilter frame backside

Jnc: compatibilty to RK11-C and RK11-D

2021-12-12T22:08:43Z

compatibilty to RK11-C and RK11-D

Jnc: /* External links */ +Manuals, eng drws

2021-10-18T03:56:55Z

‎External links: +Manuals, eng drws

Jnc: Better naming system

2020-10-29T15:19:34Z

Better naming system

Jnc: avoid redir

2020-10-28T19:21:39Z

avoid redir

Jnc: clarify, links, etc

2020-01-29T03:11:17Z

clarify, links, etc

Jnc: /* Prefilter frame */ typo

2018-08-08T18:37:24Z

‎Prefilter frame: typo

Jnc: /* Prefilter frame */ clarify

2018-08-08T18:36:30Z

‎Prefilter frame: clarify

Jnc: /* Prefilter frame */ typo, other info

2018-01-27T16:49:41Z

‎Prefilter frame: typo, other info

← Older revision		Revision as of 22:30, 14 August 2023
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	* [http://www.pdp8.net/rk05/rk05.shtml RK05 Drive Information]		* [http://www.pdp8.net/rk05/rk05.shtml RK05 Drive Information]

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

@@ Line 27: / Line 27: @@
 The '''RK05''' was moving-[[head]] [[magnetic storage]] [[disk]] drive, most versions of which used removable [[pack]]s. They were designed and manufactured by [[Digital Equipment Corporation|DEC]], and were based on, but not completely compatible with, the earlier [[RK02/03 disk drive|RK02]] and RK03 drives (which were sold by DEC, but not manufactured by them), which in turn were inspired by the IBM 2315 drive and pack.
-The packs were compatible between the RK02/03 and RK04/05 generation (the latter of each pair is the high-density version). The main difference between the RK02/03 and the RK04/05 is that the former uses rack and pinion head positioning, whereas the latter uses voice coil positioning.
+The packs were compatible between the RK02/03 and RK04/05 generation (the latter of each pair is the high-density version). The main difference between the RK02/03 and the RK04/05 is that the former uses rack and pinion head positioning, whereas the latter uses [[voice coil]] positioning.
 The pack contained a [[platter]] 14 inches in diameter, coated with iron oxide. Since the disk was hard [[sector]]ed (using narrow slots cut through a projecting cylindrical ring in the hub, with its axis parallel to the platter's rotational axis), packs used in the PDP-8 were physically incompatible with those used in the PDP-11, although the drives themselves were completely identical for both.
@@ Line 64: / Line 64: @@
 The hole locations for the hand-knob bolts can be determined from the drive; the hand-knob bolts themselves are DEC standard (and used elsewhere).
 ==External links==

@@ Line 26: / Line 26: @@
 The '''RK05''' was moving-[[head]] [[magnetic storage]] [[disk]] drive, most versions of which used removable [[pack]]s. They were designed and manufactured by [[Digital Equipment Corporation|DEC]], and were based on, but not completely compatible with, the earlier [[RK02/03 disk drive|RK02]] and RK03 drives (which were sold by DEC, but not manufactured by them), which in turn were inspired by the IBM 2315 drive and pack.
 The pack contained a [[platter]] 14 inches in diameter, coated with iron oxide. Since the disk was hard [[sector]]ed (using narrow slots cut through a projecting cylindrical ring in the hub, with its axis parallel to the platter's rotational axis), packs used in the PDP-8 were physically incompatible with those used in the PDP-11, although the drives themselves were completely identical for both.
 [[Image:RK05CartridgeLoaded.jpg|200px|thumb|left|An RK05 with a cartridge loaded]]
-The controller interface on the RK05 was mostly compatible with the earlier RK02/RK03, although it used a different 'drive select' mechanism, which allowed an [[RK11 disk controller|RK11-D]] controller to support up to 8 RK05 drives on a single drive bus, as opposed to only 4 per bus with the earlier RK02/03 and RK11-C system. The packs were compatible.
+The controller interface drive bus on the RK05 was mostly compatible with that on the earlier RK02/RK03, although it used a different 'drive select' mechanism, which allowed an [[RK11 disk controller#RK11-D|RK11-D]] [[device controller|controller]] to support up to 8 RK05 drives on a single drive bus, as opposed to only 4 per bus with the earlier RK02/03 and [[RK11-C disk controller|RK11-C]] system. (The RK11-C has two different drive buses, each which can handle up to four drives.)
 ==RK05 models==

@@ Line 59: / Line 59: @@
 ==External links==
 * [http://www.pdp8.net/rk05/rk05.shtml RK05 Drive Information]
 [[Category: DEC Disk Drives]]

@@ Line 25: / Line 25: @@
 [[Image:RK05CartridgeLoadedDoorOpen.jpg|200px|thumb|left|An RK05 with the door open, showing the removable pack (white plastic)]]
-The '''RK05''' was moving-[[head]] [[magnetic storage]] [[disk]] drive, most versions of which used removable [[pack]]s. They were designed and manufactured by [[Digital Equipment Corporation|DEC]], and were based on, but not completely compatible with, the earlier [[RK0x disk drive|RK02]] and RK03 drives (which were sold by DEC, but not manufactured by them), which in turn were inspired by the IBM 2315 drive and pack.
+The '''RK05''' was moving-[[head]] [[magnetic storage]] [[disk]] drive, most versions of which used removable [[pack]]s. They were designed and manufactured by [[Digital Equipment Corporation|DEC]], and were based on, but not completely compatible with, the earlier [[RK02/03 disk drive|RK02]] and RK03 drives (which were sold by DEC, but not manufactured by them), which in turn were inspired by the IBM 2315 drive and pack.
 The pack contained a [[platter]] 14 inches in diameter, coated with iron oxide. Since the disk was hard [[sector]]ed (using narrow slots cut through a projecting cylindrical ring in the hub, with its axis parallel to the platter's rotational axis), packs used in the PDP-8 were physically incompatible with those used in the PDP-11, although the drives themselves were completely identical for both.

@@ Line 25: / Line 25: @@
 [[Image:RK05CartridgeLoadedDoorOpen.jpg|200px|thumb|left|An RK05 with the door open, showing the removable pack (white plastic)]]
-The '''RK05''' was moving-head [[magnetic storage]] [[disk]] drive, most versions of which used removable [[pack]]s. They were designed and manufactured by [[DEC]], and based on, but not completely compatible with, the earlier [[RK02]] and RK03 drives (which were sold by DEC, but not manufactured by them), which in turn were inspired by the IBM 2315 drive and pack.
+The '''RK05''' was moving-[[head]] [[magnetic storage]] [[disk]] drive, most versions of which used removable [[pack]]s. They were designed and manufactured by [[Digital Equipment Corporation|DEC]], and were based on, but not completely compatible with, the earlier [[RK02 disk drive|RK02]] and RK03 drives (which were sold by DEC, but not manufactured by them), which in turn were inspired by the IBM 2315 drive and pack.
-The pack contained a [[platter]] 14 inches in diameter, coated with iron oxide. Since the disk was hard [[sector]]ed (using narrow slots cut through a projecting ring in the hub), packs used in the PDP-8 were physically incompatible with those used in the PDP-11, although the drives themselves were completely identical for both.
+The pack contained a [[platter]] 14 inches in diameter, coated with iron oxide. Since the disk was hard [[sector]]ed (using narrow slots cut through a projecting cylindrical ring in the hub, with its axis parallel to the platter's rotational axis), packs used in the PDP-8 were physically incompatible with those used in the PDP-11, although the drives themselves were completely identical for both.
 [[Image:RK05CartridgeLoaded.jpg|200px|thumb|left|An RK05 with a cartridge loaded]]
-The controller interface on the RK05 was mostly compatible with the earlier RK02/RK03, although it used a different 'drive select' mechanism, which allowed an [[RK11|RK11-D]] controller to support up to 8 RK05 drives on a single drive bus, as opposed to only 4 per bus with the earlier RK02/03 and RK11-C system. The packs were compatible.
+The controller interface on the RK05 was mostly compatible with the earlier RK02/RK03, although it used a different 'drive select' mechanism, which allowed an [[RK11 disk controller|RK11-D]] controller to support up to 8 RK05 drives on a single drive bus, as opposed to only 4 per bus with the earlier RK02/03 and RK11-C system. The packs were compatible.
 ==RK05 models==
@@ Line 53: / Line 53: @@
 For those who wish to fabricate replacements, here are images (from the top, shown to the right, and from the bottom, available [[:File:RK05PrefilterFrameBottom.jpg|here]], and measurements.
-The overall size is 21.65cm by 13.05cm; the height is 1.05cm. The side/end members are 1.35cm wide; the material is 2.3mm thick (but this includes a rather thick paint coat). The cutout in one side (for the drive signal cable) is 12.0cm by 0.50cm. The hexagonal mesh is 1mm thick, and repeats on a 7mm pattern. The external radius where the side members bend over appears to be about 2.4mm (it's a bit diffult to measure exactly because of the thick, soft paint coating).
+The overall size is 21.65cm by 13.05cm; the height is 1.05cm. The side/end members are 1.35cm wide; the material is 2.3mm thick (but this includes a rather thick paint coat). The cutout in one side (for the drive signal cable) is 12.0cm by 0.50cm. The hexagonal mesh is 1mm thick, and repeats on a 7mm pattern. The external radius where the side members bend over appears to be about 2.4mm (it's a bit difficult to measure exactly because of the thick, soft paint coating).
 The hole locations for the hand-knob bolts can be determined from the drive; the hand-knob bolts themselves are DEC standard (and used elsewhere).

@@ Line 51: / Line 51: @@
 It is now common to find RK05 drives which are missing their prefilter frame (which holds on the prefilter over the air inlet to the logic assembly area), since it has to be removed to remove the signal cable to the drive, and it's often not replaced afterwards.
-For those who wish to fabricate replacements, here are images (from the top, shown to the right, and from the bottom, available[[:File:RK05PrefilterFrameBottom.jpg|here]], and measurements.
+For those who wish to fabricate replacements, here are images (from the top, shown to the right, and from the bottom, available [[:File:RK05PrefilterFrameBottom.jpg|here]], and measurements.
 The overall size is 21.65cm by 13.05cm; the height is 1.05cm. The side/end members are 1.35cm wide; the material is 2.3mm thick (but this includes a rather thick paint coat). The cutout in one side (for the drive signal cable) is 12.0cm by 0.50cm. The hexagonal mesh is 1mm thick, and repeats on a 7mm pattern. The external radius where the side members bend over appears to be about 2.4mm (it's a bit diffult to measure exactly because of the thick, soft paint coating).