Hitachi Copy-on Write SnapShot, User Manual, Page: 85 / 90

Glossary–13
Hitachi Simple Modular Storage Copy-on-Write SnapShot User’s Guide
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
S-VOL determination
Independent of update operations, S-VOL determination replicates the
S-VOL on the remote storage system. This process occurs at the end of
each update cycle and a pre-determined copy of S-VOL data, consistent
with P-VOL data, is maintained on the remote site at all times.
T
target copy
A file, device, or any type of location to which data is moved or copied.
V
virtual volume (V-VOL)
In Copy-on-Write, a secondary volume in which a view of the primary
volume (P-VOL) is maintained as it existed at the time of the last
snapshot. The V-VOL contains no data but is composed of pointers to
data in the P-VOL and the data pool. The V-VOL appears as a full
volume copy to any secondary host.
volume
A disk array object that most closely resembles a physical disk from the
operating environment's viewpoint. The basic unit of storage as seen
from the host.
volume copy
Copies all data from the P-VOL to the S-VOL.
volume pair
Formed by pairing two logical data volumes. It typically consists of one
primary volume (P-VOL) on the local storage system and one
secondary volume (S-VOL) on the remote storage systems.
V-VOL
See virtual volume.
V-VOLTL
Virtual Volume Tape Library.
W
WMS
Workgroup Modular Storage.