SM
shared memory
SN
serial number; Device Manager - Storage Navigator
snapshot
A point-in-time virtual copy of a Hitachi Thin Image primary volume (P-
VOL). The snapshot is maintained when the P-VOL is updated by storing
pre-updated data (snapshot data) in a data pool.
SNMP
See Simple Network Management Protocol.
source volume (S-VOL)
The volume containing the original data that is duplicated on the target
volume (T-VOL). Also known as primary volume.
space
Generally refers to the storage capacity of a data drive (for example, hard
disk drive, flash drive).
SS
snapshot
SSB
sense byte
SSD
solid-state drive. Also called flash drive.
SSID
See storage subsystem identifier.
storage subsystem identifier (SSID)
In a mainframe environment, SSIDs are used for reporting information
from the control unit (CU) image to the mainframe operating system. An
SSID is assigned to each group of 64 or 256 volumes to define one or four
SSIDs per CU image. The user-specified SSIDs are assigned during
storage system installation and must be unique to all connected host
operating environments.
316 Glossary
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series
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