User guide

Overview, Continued
Using the
EF5XX
You can use the EF5XX-series ISEs with these VAX family
systems:
VAX4000
VAX6000
VAX7000
VAX10000
EF5XX
Options
These are the EF5XX ISEs covered in this guide and their
formatted storage capacities:
EF51R, 107 megabytes
EF52R, 205 megabytes
EF53, 267 megabytes
Data
Retention
System
Description
The EF51R and the EF52R ISEs provide non-volatility of data
by a data retention system including:
Power sensing logic
An internal winchester magnetic disk drive
A battery to power the EF5XX while dumping data to the
winchester disk
For more detailed information on data retention, refer to
Chapter 5.
Continued on next page
1–3