RC25 disk drive: Difference between revisions
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{{Infobox Disk drive | |||
| name = RC25 | |||
| manufacturer = [[Digital Equipment Corporation|DEC]] | |||
<!-- | year introduced = | |||
| year discontinued = --> | |||
| controller = [[KLESI Low-End Storage Interconnect]] | |||
| capacity = 26 Mbytes (fixed)<br>26 Mbytes (removeable) | |||
| transfer rate = 1.25 Mbytes/sec | |||
<!-- | minimum access time = --> | |||
| average access time = 30.5-45.5 msec | |||
<!-- | maximum access time = --> | |||
| rpm = 2850 | |||
| revolution time = 10.5 msec | |||
<!-- | one track seek = msec --> | |||
| average seek = 20-35 msec | |||
| maximum seek = 55 msec | |||
| media = 1 fixed<br>1 removeable | |||
| surfaces = 4 (2 fixed, 2 removeable) | |||
| number of heads = 4 | |||
| tracks = 821 | |||
| sectors = 31 | |||
| bytes per sector = 512 | |||
| tracks per inch = 1,000 | |||
| density = 12,350 bits/inch | |||
<!-- | recording method = [[Modified Frequency Modulation|MFM]] --> | |||
| start time = 60 secs (max) | |||
| stop time = 30 secs (max) | |||
| physical size = 10.4" x 19.9" x 22.1" | |||
| weight = 65 lbs (single drive) | |||
| power consumption = 300 watts (idle) | |||
}} | |||
{{stub}} | The '''RC25 disk drive''' was a combination [[non-removable-media disk]] and [[removable-pack disk]] (using a sealed [[pack]]) on a singled [[spindle]], from [[Digital Equipment Corporation|DEC]]. Each 8" [[platter]] had a capacity of 26 MB, for a total of 52 MB. It connected to the [[device controller]] via the DEC standard [[Low End System Interconnect]] [[bus]]; a second 'slave' drive can be connected to the first 'master' drive. It uses the [[Mass Storage Control Protocol]], and is member of the [[Digital Storage Architecture]]. | ||
{{semi-stub}} | |||
==External links== | ==External links== | ||
* [http://bitsavers.org/pdf/dec/disc/rc25/ rc25] - documentation at [[Bitsavers]] | * [http://bitsavers.org/pdf/dec/disc/rc25/ rc25] - documentation at [[Bitsavers]] | ||
* [http://bitsavers.org/pdf/dec/brochures/DEC-RS25-DiskSubsystem.pdf RC25 Disk Subsystem] | * [http://bitsavers.org/pdf/dec/brochures/DEC-RS25-DiskSubsystem.pdf RC25 Disk Subsystem] - brochure | ||
* [https://manx-docs.org/collections/antonio/dec/ek-0rc25-ps-002.pdf RC25 Disk Subsystem Pocket Service Guide] (EK-0RC25-PS-002) | * [https://manx-docs.org/collections/antonio/dec/ek-0rc25-ps-002.pdf RC25 Disk Subsystem Pocket Service Guide] (EK-0RC25-PS-002) | ||
[[Category: DEC Non-removable-media Disks]] | [[Category: DEC Non-removable-media Disks]] | ||
[[Category: DEC Removable-pack Disks]] | [[Category: DEC Removable-pack Disks]] | ||
[[Category: | [[Category: LESI Disk Drives]] | ||
Latest revision as of 18:22, 23 April 2024
| RC25 | |
| Manufacturer: | DEC |
|---|---|
| Drive Controller(s): | KLESI Low-End Storage Interconnect |
| Capacity: | 26 Mbytes (fixed) 26 Mbytes (removeable) |
| Transfer Rate: | 1.25 Mbytes/sec |
| Average Access Time: | 30.5-45.5 msec |
| Revolutions per Minute: | 2850 |
| 1/2 Revolution Time: | 10.5 msec |
| Average Seek Time: | 20-35 msec |
| Maximum Seek Time: | 55 msec |
| Media: | 1 fixed 1 removeable |
| Total Surfaces: | 4 (2 fixed, 2 removeable) |
| Number of Heads: | 4 |
| Tracks per Surface: | 821 |
| Sectors per Track: | 31 |
| Bytes per Sector: | 512 |
| Tracks per Inch: | 1,000 |
| Density: | 12,350 bits/inch |
| Start Time: | 60 secs (max) |
| Stop Time: | 30 secs (max) |
| Physical Size: | 10.4" x 19.9" x 22.1" |
| Weight: | 65 lbs (single drive) |
| Power Consumption: | 300 watts (idle) |
The RC25 disk drive was a combination non-removable-media disk and removable-pack disk (using a sealed pack) on a singled spindle, from DEC. Each 8" platter had a capacity of 26 MB, for a total of 52 MB. It connected to the device controller via the DEC standard Low End System Interconnect bus; a second 'slave' drive can be connected to the first 'master' drive. It uses the Mass Storage Control Protocol, and is member of the Digital Storage Architecture.
External links
- rc25 - documentation at Bitsavers
- RC25 Disk Subsystem - brochure
- RC25 Disk Subsystem Pocket Service Guide (EK-0RC25-PS-002)
