RL01/02 disk drive: Difference between revisions
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| name = RL01 | | name = RL01 | ||
| manufacturer = [[Digital Equipment Corporation]] | | manufacturer = [[Digital Equipment Corporation]] | ||
| | | controller = [[RL11 disk controller|RL11]] ([[UNIBUS]]) | ||
[[ | | capacity = 5.2 Mbytes (formatted) | ||
| transfer rate = 512 Kbytes/sec<br>3.9 usec/word (peak) | |||
| average access time = 67.5 msec | |||
| rpm = 2400 | |||
| revolution time = 12.5 msec | |||
| one track seek = 15 msec | |||
| average seek = 55 msec | |||
| maximum seek = 100 msec | |||
| surfaces = 2 | |||
| tracks = 256 | |||
| sectors = 40 | |||
| words per sector = 128 | |||
| tracks per inch = 125 | |||
| density = 3725 bpi (maximum) | |||
| recording method = [[Modified Frequence Modulation]] (MFM) | |||
| physical size = 19" W x 10-1/2" H x 25" L | |||
| weight = 55 pounds | |||
| power consumption = 160W (running); 550 VA (starting) | |||
}} | |||
[[Image:rl01.jpg|150px|thumb|left|An RL01]] | |||
The RL01 is a 5MiB, single platter, removable [[pack]] [[disk|disk drive]] introduced in 1976 by [[Digital Equipment Corporation]]. It used an [[IBM 5440]] type pack, as used on the [[IBM System/3]]. | |||
To keep the [[head]]s properly aligned on the [[track]]s, it used a servo system driven by servo data written on the pack (along with [[sector]] headers) at the factory; packs ''cannnot'' be low-level re-formatted in the field. | |||
[[Image:rl01drive.jpg|150px|thumb|left|RL01 drive]] | |||
The [[QBUS]] controllers are the [[RLV11]] and [[RLV12]], the latter being the [[QBUS|Q22]] version. | |||
The [[RL02 disk drive|RL02]] is a higher density version, with twice as many [[track]]s. | |||
[[Category: DEC Disk Drives]] | [[Category: DEC Disk Drives]] | ||
Revision as of 13:01, 5 October 2017
| RL01 | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Drive Controller(s): | RL11 (UNIBUS) |
| Capacity: | 5.2 Mbytes (formatted) |
| Transfer Rate: | 512 Kbytes/sec 3.9 usec/word (peak) |
| Average Access Time: | 67.5 msec |
| Revolutions per Minute: | 2400 |
| 1/2 Revolution Time: | 12.5 msec |
| One Track Seek Time: | 15 msec |
| Average Seek Time: | 55 msec |
| Maximum Seek Time: | 100 msec |
| Total Surfaces: | 2 |
| Tracks per Surface: | 256 |
| Sectors per Track: | 40 |
| Words per Sector: | 128 |
| Tracks per Inch: | 125 |
| Density: | 3725 bpi (maximum) |
| Recording Method: | Modified Frequence Modulation (MFM) |
| Physical Size: | 19" W x 10-1/2" H x 25" L |
| Weight: | 55 pounds |
| Power Consumption: | 160W (running); 550 VA (starting) |
The RL01 is a 5MiB, single platter, removable pack disk drive introduced in 1976 by Digital Equipment Corporation. It used an IBM 5440 type pack, as used on the IBM System/3.
To keep the heads properly aligned on the tracks, it used a servo system driven by servo data written on the pack (along with sector headers) at the factory; packs cannnot be low-level re-formatted in the field.
The QBUS controllers are the RLV11 and RLV12, the latter being the Q22 version.
The RL02 is a higher density version, with twice as many tracks.
