Difference between revisions of "EF51R Solid State Disk Drive"

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The EF51R is the smallest drive of Digital Equipment Corporation’s first generation of [[Solid State Disk Drive]]s packaged in a full-height, 5 1⁄4-inch form factor. The EF51R ISE provides non-volatility of data by a data retention system including:
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The EF51R is the smallest drive of Digital Equipment Corporation’s first generation of [[Solid State Disk]]s packaged in a full-height, 5 1⁄4-inch form factor. The EF51R ISE provides non-volatility of data by a data retention system including:
 
* Power sensing logic
 
* Power sensing logic
 
* An internal winchester magnetic disk drive
 
* An internal winchester magnetic disk drive

Revision as of 11:03, 19 August 2023


EF51R
Manufacturer: Digital Equipment Corporation
Drive Controller(s): all DSSI Controllers
Capacity: 107 Mbytes (formatted)
Transfer Rate: 4.0 Mbytes/sec
Average Access Time: 0.25 msec
Start Time: < 2 min
Physical Size: 5.25" full height


The EF51R is the smallest drive of Digital Equipment Corporation’s first generation of Solid State Disks packaged in a full-height, 5 1⁄4-inch form factor. The EF51R ISE provides non-volatility of data by a data retention system including:

  • Power sensing logic
  • An internal winchester magnetic disk drive
  • A battery to power the EF51R while dumping data to the winchester disk

External links