Hitachi Virtual Storage Platform G400 - Glossary: Definitions Q-R

parity group
See RAID gr
oup.
PAV
Hitachi Compatible PAV
PCB
printed circuit board
PDEV
physical device
PG
parity group. See RAID group.
physical device
See device.
pool
A set of volumes that are reserved for storing pool volumes (pool-VOL), and used by Thin Image,
Dynamic Provisioning, Dynamic Tiering, or active ash data.
pool volume (pool-VOL)
A logical volume that is reserved for storing snapshot data for Thin Image operations or write data
for Dynamic Provisioning, Dynamic Tiering, or active ash.
port attribute
Indicates the type of bre-channel port: target, RCU target, or initiator.
primary volume (P-VOL)
The volume in a copy pair that contains the original data to be replicated. The data on the P-VOL is
duplicated synchronously or asynchronously on the secondary volume (S-VOL).
The following Hitachi products use the term P-VOL: Thin Image, Copy-on-Write Snapshot,
ShadowImage, TrueCopy, Universal Replicator, Universal Replicator for Mainframe, and High
Availability Manager.
See also secondary volume.
prio
priority mode. Used in Cache Residency Manager.
Q
quick format
The quick format feature in Virtual LVI/Virtual LUN in which the formatting of the internal volumes is
done in the background. This allows system conguration (such as dening a path or creating a
TrueCopy pair) before the formatting is completed. To execute quick formatting, the volumes must
be in blocked status.
quick restore
A reverse resynchronization in which no data is actually copied: the primary and secondary volumes
are swapped.
Glossary
System Administrator Guide for VSP Gx00 models and VSP Fx00 models 356