HP 3PAR T-Class Storage Systems - Manual (Page 469)

3PAR InForm Management Console 4.1.0 User’s Guide
320-200231 Rev A 469
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.
SFP: High-speed data transceiver, small in size and hot pluggable, allowing for an individual
SFP connector to be replaced without replacing the entire module.
small form-factor pluggable optical transceiver: See SFP.
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.
snapshot data: Data written to the base volume's snapshot data space to record changes
to the base volume after the first virtual copy of that volume was created.
snapshot data space: The space on a virtual volume that holds the data that has been
changed since the first virtual copy was created.
solid state drive: A data storage device that uses solid-state memory to store persistent
data.
source server: See primary server.
source volume: The virtual volume from which a copy is made.
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.
SSD: See solid state drive.
stale snapshot: A snapshot that does not track the most recent changes to its base
volume. The No Stale Snapshots virtual copy policy halts writing data to the base
volume so as to prevent loss of sync between the volume and any snapshots. See
also virtual copy policy and no stale snapshots.
step size: The number of contiguous bytes that the system accesses before moving to the
next chunklet.
system manager: Software component that negotiates between the storage server and
the user interfaces such as the InForm Management Console and InForm CLI.
T
target mode: The firmware setting for a port that is connected to a host.
target, target port: The port that is connected to and receives commands from a host
computer. Also known as a host port.
template: See VLUN template.
thin provisioning: See 3PAR Thin Provisioning.
thinly provisioned virtual volume (TPVV): A virtual volume that maps to logical disk
space associated with a common provisioning group (CPG) and is therefore capable
of growing on demand.
TPVV: See thinly provisioned virtual volume.