Glossary
ATM Asynchronous transfer mode.
BC P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies
in the disk array.
BC z This is the version of BC that supports mainframe volumes. See BC for more information.
bit The basic unit of data in a binary numbering system (binary digit), represented by a 0 or a 1.
Eight bits equals one byte.
CLPR Cache logical partition.
CNT Computer network technologies.
Cnt Ac-S P9000 or XP Continuous Access Synchronous software.
Cnt Ac-S Z The version of Continuous Access Synchronous that supports mainframe volumes.
CU Control Unit. Used to organize the storage space attached to the disk controller ( DKC). You can
group similarly configured logical devices (LDEVs) with unique control unit images (CUs). CUs
are numbered sequentially. The disk array supports a certain number of CUs, depending on the
disk array model. Each CU can manage multiple LDEVs; therefore, both the CU number and the
LDEV number are required to identify an LDEV.
DFSMS Data Facility Storage Management Subsystem.
DKC Disk controller.
M-VOL Main volume.
P-VOL Primary volume.
path A path is created by associating a port, a target, and a LUN ID with one or more LDEVs. Also
known as a LUN.
R-VOL Remote volume.
Remote Web
Console
A browser-based program installed on the SVP that allows you to configure and manage the disk
array.
S-VOL Secondary or remote volume. The copy volume that receives the data from the primary volume.
SCP State-change-pending.
SIM Service information message.
synchronous Describes computing models that perform tasks in chronological order without interruption. In
synchronous replication, the source waits for data to be copied at the destination before
acknowledging that it has been written at the source.
T-VOL Target volume.
VOL, vol Volume.
volume Volume on disk. An accessible storage area on disk, either physical or virtual.
32 Glossary
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