Difference between revisions of "RP04 disk drive"

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| manufacturer = Sperry Univac ISS (basic drive), Digital Equipment Corporation (electronics)  
 
| manufacturer = Sperry Univac ISS (basic drive), Digital Equipment Corporation (electronics)  
 
| capacity = 88 Mbytes
 
| capacity = 88 Mbytes
| controller = [[RH11 MASSBUS controller|RH11]] ([[UNIBUS]])
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| controller = [[RH10 MASSBUS controller|RH10]] ([[PDP-10]])<br>[[RH11 MASSBUS controller|RH11]] ([[UNIBUS]])<br>[[RH70 MASSBUS controller|RH70]] ([[PDP-11/70]])
 
| average access time = 36.3 msec
 
| average access time = 36.3 msec
 
| transfer rate = 2.5 usec/word
 
| transfer rate = 2.5 usec/word
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<!-- | tracks per inch = 100 -->
 
<!-- | tracks per inch = 100 -->
 
| density = 4040 bpi (maximum)
 
| density = 4040 bpi (maximum)
| recording method = [[Modified Frequence Modulation]] (MFM)
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| recording method = [[Modified Frequency Modulation]] (MFM)
 
| physical size = 31" W x 40" H x 32" L
 
| physical size = 31" W x 40" H x 32" L
 
| weight = 600 pounds
 
| weight = 600 pounds
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}}
 
}}
  
The '''RP04''' was the successor to the [[RP03 disk drive|RP03]] multi-[[platter]] large [[disk]] drive. It used a [[pack]] compatible with the [[IBM 3336]] pack, used on the [[IBM 3330]] drive.
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The '''RP04''' was the successor to the [[RP03 disk drive|RP03]] multi-[[platter]] large [[disk]] drive, and the predecessor to the later [[RP05 disk drive|RP05]]. It used a [[pack]] compatible with the [[IBM 3336]] pack, used on the [[IBM 3330]] drive.
  
The actual drive was produced by the Information Storage Systems (ISS) division of Sperry Univac, and [[OEM]]'d by [[DEC]].
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The actual drive was produced by the Information Storage Systems (ISS) division of Sperry Univac (a model 733-10), and [[Original Equipment Manufacturer|OEM]]'d by [[DEC]], who added interface [[electronic]]s.
  
 
It was the first large drive to use the [[MASSBUS]] bus; thus, it did not have a specific [[device controller]], but used the appropriate MASSBUS controller. A maximum of 8 drives were supported per controller.
 
It was the first large drive to use the [[MASSBUS]] bus; thus, it did not have a specific [[device controller]], but used the appropriate MASSBUS controller. A maximum of 8 drives were supported per controller.
  
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==See also==
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* [[RP05 disk drive]]
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* [[RP06 disk drive]]
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[[Category: MASSBUS Devices]]
 
[[Category: DEC Disk Drives]]
 
[[Category: DEC Disk Drives]]

Latest revision as of 02:02, 2 August 2021



RP04
Manufacturer: Sperry Univac ISS (basic drive), Digital Equipment Corporation (electronics)
Drive Controller(s): RH10 (PDP-10)
RH11 (UNIBUS)
RH70 (PDP-11/70)
Capacity: 88 Mbytes
Transfer Rate: 2.5 usec/word
Average Access Time: 36.3 msec
Revolutions Per Minute: 3600
1/2 Revolution Time: 8.3 msec
One Track Seek Time: 7 msec
Average Seek Time: 28 msec
Maximum Seek Time: 50 msec
Total Surfaces: 19
Tracks Per Surface: 411
Sectors Per Track: 22
Words Per Sector: 256
Density: 4040 bpi (maximum)
Recording Method: Modified Frequency Modulation (MFM)
Physical Size: 31" W x 40" H x 32" L
Weight: 600 pounds
Power Consumption: 660 VA per phase (running); 3300 VA per phase (starting, 10 seconds max)


The RP04 was the successor to the RP03 multi-platter large disk drive, and the predecessor to the later RP05. It used a pack compatible with the IBM 3336 pack, used on the IBM 3330 drive.

The actual drive was produced by the Information Storage Systems (ISS) division of Sperry Univac (a model 733-10), and OEM'd by DEC, who added interface electronics.

It was the first large drive to use the MASSBUS bus; thus, it did not have a specific device controller, but used the appropriate MASSBUS controller. A maximum of 8 drives were supported per controller.

See also