Difference between revisions of "RL01/02 disk drive"

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m (Jnc moved page RL01 to RL01 disk drive: Canonical naming system)
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| name = RL01
 
| name = RL01
 
| manufacturer = [[Digital Equipment Corporation]]  
 
| manufacturer = [[Digital Equipment Corporation]]  
|}}
+
| controller = [[RL11 disk controller|RL11]] ([[UNIBUS]])
[[Image:rl01.jpg|150px|thumb|right|A RL01]]
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| capacity = 5.2 Mbytes (formatted)
[[Image:rl01drive.jpg|150px|thumb|right|RL01 drive]]
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| transfer rate = 512 Kbytes/sec<br>3.9 usec/word (peak)
The RL01 is a 5MiB, single platter, removable cartridge drive introduced in 1976 by [[Digital Equipment Corporation]].
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| 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)
 +
}}
  
Its 22-bit [[QBUS]] controller is the [[RLV11]],[[RLV12]]
+
[[Image:rl01.jpg|150px|thumb|left|An RL01]]
  
Its [[UNIBUS]] controller is the [[RL11]]
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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]].
  
Its higher-end cousin is the [[RL02]]
+
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.
  
5.2 MB, 512 KB/s transfer, 67.5 ms average access time, 15 ms track-to-track seek time, 2400 rpm
+
[[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 14:01, 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)


An RL01

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.

RL01 drive

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.