Difference between revisions of "RK05 disk drive"
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| capacity = 2.45 Mbytes (most versions) | | capacity = 2.45 Mbytes (most versions) | ||
| controller = [[RK8E]] ([[Omnibus]])<br>[[RK11|RK11-D]] ([[UNIBUS]])<br>[[RK11|RKV11-D]] ([[QBUS]]) | | controller = [[RK8E]] ([[Omnibus]])<br>[[RK11|RK11-D]] ([[UNIBUS]])<br>[[RK11|RKV11-D]] ([[QBUS]]) | ||
| + | | average access time = 70 msec | ||
| rpm = 1500 | | rpm = 1500 | ||
| + | | revolution time = 20 msec | ||
| + | | One track seek = 10 msec | ||
| + | | Average seek = 50 msec | ||
| + | | Maximum seek = 85 msec | ||
| surfaces = 2 | | surfaces = 2 | ||
| + | | tracks per surface = 203 (nominally 200 plus 3 spares; many systems used all 203, as reliability was high) | ||
| sectors per track = 16 (RK8E)<br>12 (RK11) | | sectors per track = 16 (RK8E)<br>12 (RK11) | ||
| words per sector = 256 | | words per sector = 256 | ||
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| recording method = Double Frequency NRZ | | recording method = Double Frequency NRZ | ||
| transfer rate = 102 Kword/sec (RK8E)<br>90.1 Kword/sec (RK11) | | transfer rate = 102 Kword/sec (RK8E)<br>90.1 Kword/sec (RK11) | ||
| + | | physical size = 19" W x 10.5" H x 26.5" L | ||
| + | | Weight = 110 pounds | ||
| + | | Power consumption = 230 VA (running); 1150 VA (starting, 2 sec) | ||
}} | }} | ||
| − | [[Image:RK05CartridgeLoadedDoorOpen.jpg|200px|thumb| | + | [[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 [[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 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 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. | ||
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| + | [[Image:RK05CartridgeLoaded.jpg|200px|thumb|right|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|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. | ||
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==RK05 models== | ==RK05 models== | ||
| − | [[Image: | + | [[Image:RK05Head.jpg|200px|thumb|left|An RK05 head]] |
* RK05E - a version which contained many reliability enhancements | * RK05E - a version which contained many reliability enhancements | ||
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* RK05F - a version using a permanently installed platter, which allowed it to operate at twice the track density of the standard RK05, doubling the capacity of the drive; a single RK05F emulated two normal RK05 drives | * RK05F - a version using a permanently installed platter, which allowed it to operate at twice the track density of the standard RK05, doubling the capacity of the drive; a single RK05F emulated two normal RK05 drives | ||
| − | == | + | ==External links== |
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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 Disk Drives]] | ||
Revision as of 22:01, 2 October 2017
| RK05 | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Drive Controller(s): | RK8E (Omnibus) RK11-D (UNIBUS) RKV11-D (QBUS) |
| Capacity: | 2.45 Mbytes (most versions) |
| Transfer Rate: | 102 Kword/sec (RK8E) 90.1 Kword/sec (RK11) |
| Average Access Time: | 70 msec |
| Revolutions per Minute: | 1500 |
| 1/2 Revolution Time: | 20 msec |
| Total Surfaces: | 2 |
| Words per Sector: | 256 |
| Tracks per Inch: | 100 |
| Density: | 2200 bpi |
| Recording Method: | Double Frequency NRZ |
| Physical Size: | 19" W x 10.5" H x 26.5" L |
The RK05 was moving-head magnetic storage disk drive, most versions of which used removable packs. 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 pack contained a platter 14 inches in diameter, coated with iron oxide. Since the disk was hard sectored (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 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-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
- RK05E - a version which contained many reliability enhancements
- RK05J - the final version
- RK05F - a version using a permanently installed platter, which allowed it to operate at twice the track density of the standard RK05, doubling the capacity of the drive; a single RK05F emulated two normal RK05 drives
