3PAR InForm® OS 2.3.1 Concepts Guide (320-200112 Rev B, February 2010)

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Glossary
InForm OS Version 2.3.1 3PAR InForm OS Concepts Guide
safety breaker
The device used to power on and power off the
power distribution unit. The safety breaker also
prevents power surges in the AC line from
damaging a storage server.
second virtual volume backup node
The controller node that takes over for the
virtual volume backup node if the virtual volume
node fails.
secondary path
Connection between a controller node initiator
port and a physical disk that is used when the
primary path is inaccessible (a failure condition).
The primary and secondary paths are not user
configurable and are determined by drive
magazine placement.
selecting
In the InForm Management Console, Selecting
table entries highlights only the table entries
that meet the specified criteria. See also filtering.
service processor
A device inserted into a rack that enables 3PAR
service personnel to locally and remotely
monitor and service 3PAR Storage Servers.
set
See RAID set.
set size
The number of chunklets in a set. Also known as
mirror depth for RAID 1 sets and parity set for
RAID 5 sets.
severity indicator
Icon in the InForm Management Console alert
pane or on the InForm Management Console
status bar that shows the seriousness of an alert.
See also alert pane and status bar.
SFP
See small form-factor pluggable transceiver.
snapshot
A virtual or physical copy of a virtual volume.
snapshot administration space
The space on a virtual volume that is used to
track changes to the data since a snapshot of a
virtual volume was created.
source volume
The virtual volume from which a copy is made.
spare status
Indicates whether a chunklet is reserved as a
spare or has been selected by the system for use
in sparing on a temporary basis.
spare, spare chunklet
A chunklet that is reserved for use in case of a
failure in the system. A certain number of
chunklets are reserved for use as spares during
the system setup and installation process.
However, the system may temporarily set aside
additional spares even though these chunklets
are not permanently designated for use as
spares.
sparing
The automatic relocation of chunklets on a
physical disk when a logging logical disk
becomes full. See also spare chunklets.
stale data
Snapshot data that is no longer valid because the
base volume did not have enough snapshot
administration and/or snapshot data space to
record new changes to that base volume.
stale snapshot
A snapshot that does not track the most recent
changes to its base volume. The No Stale