HP XP RAID Manager Software - Manual (Page 35)

Glossary
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.
DKA Disk adapter.
DKC Disk controller.
DKU Disk Unit.
HDD Hard disk drive.
M-VOL Main volume.
MCU Main control unit.
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.
PCB Printed circuit board.
PDU Power distribution unit. The rack device that distributes conditioned AC or DC power within a
rack.
port A physical connection that allows data to pass between a host and the disk array. The number
of ports on a disk array depends on the number of supported I/O slots and the number of ports
available per I/O adapter. The P9000 and XP family of disk arrays supports Fibre Channel (FC)
ports and other port types. Ports are named by port group and port letter, such as CL1-A. CL1 is
the group; A is the port letter.
R-VOL Remote volume.
RCU Remote control unit.
Remote Web
Console A browser-based program installed on the SVP that allows you to configure and manage the disk
array.
RIO Remote I/O.
S-VOL Secondary or remote volume. The copy volume that receives the data from the primary volume.
SAS Serial Attached SCSI.
SIM Service information message.
SMPL Simplex.
SVP Service processor. A computer built into a disk array. The SVP, used only by an HP service
representative, provides a direct interface to the disk array.
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.
UDP User Datagram Protocol.
VOL, vol Volume.
volume Volume on disk. An accessible storage area on disk, either physical or virtual.
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