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EMC Symmetrix DMX-3 Product Guide
Glossary
Dynamic sparing A Symmetrix feature that automatically transfers data from a failing
disk drive to an available spare disk drive without affecting data
availability. This feature supports all devices in the Symmetrix
subsystem and is used with Mirroring, RAID 5, and SRDF options.
Dynamic Path
Reconnect (DPR)
A function that allows disconnected I/O operations with the
Symmetrix system to reconnect over any available channel path
rather than be limited to the one on which the I/O operation was
started. This function is available only on System 370/XA, System
370/ESA, and System 390/ESA systems.
E
EMIF ESCON Multiple Image Facility. Allows sharing of ESCON channels
among logical partitions (LPAR).
Enginuity Enginuity is the operating environment for the EMC Symmetrix
Enterprise Storage Platforms. Enginuity provides functional services
for both its host Symmetrix systems as well as for a large suite of
EMC Storage Application software.
EPO Emergency Power Off.
EREP program Environmental Recording, Editing, and Printing—The program that
formats and prepares reports from the data contained in the Error
Recording Dataset (ERDS).
error verification The process of reading, checking the error correction bits, and writing
corrected data back to the source.
ESA Enterprise System Architecture (mainframe systems only).
ESCON Enterprise Systems Connection.
ESCON director Device that provides a dynamic switching function and extended link
path lengths (with XDF capability) when attaching an ESCON
channel to a Symmetrix serial channel interface.
ESP Enterprise Storage Platform. Symmetrix ESP is a functional
enhancement that allows simultaneous storage and access of
mainframe data and open systems data on the same Symmetrix
system.
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