Glossary - HP StorageWorks P9000 - Disk Arrays User Manual

Glossary

CLI Command-line interface. An interface comprised of various commands which are used to control
operating system responses.
CLPR cache logical partitions.
Cnt Ac-J HP StorageWorks P9000 or XP Continuous Access Journal Software.
Cnt Ac-J Z This is the version of Continuous Access Journal that supports mainframe volumes. See Cnt Ac-J
for more information.
Cnt Ac-S HP StorageWorks P9000 or XP Continuous Access Synchronous software.
Cnt Ac-S Z This is the version of Continuous Access Synchronous that supports mainframe volumes. See Cnt
Ac-S for more information.
command device A volume in the disk array that accepts HP StorageWorks Continuous Access, HP StorageWorks
Business Copy, or HP StorageWorks P9000 Business Continuity Manager control operations,
which are then executed by the array.
CU Control Unit. The Control Unit is used to organize the storage space attached to the 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, to uniquely identify a
particular LDEV requires both the CU number and the LDEV number.
DKC Disk controller.
ERC Error reporting communications.
failover An operation that reverses replication direction so that the destination becomes the source and
the source becomes the destination. Failovers can be planned or unplanned and can occur
between DR groups, managed sets, fabrics or paths, and array controllers.
fence level A method of setting rejection of P9000 or XP Continuous Access write I/O requests from the host
according to the condition of mirroring consistency.
Fibre Channel A serial data transport infrastructure and protocol used to implement storage area networks
(SANs).
instance A running copy of RAID Manager. Instances can be local or remote. Multiple instances can run
on the same host.
instance A RAID Manager file that defines the link between a volume and a RAID Manager instance. This
configuration file file consists of five sections: HORCM_MON, HORCM_CMD, HORCM_DEV, HORCM_LDEV, and
HORCM_INST.
LDKC Logical disk controller.
LUN Logical unit number.
LUSE Logical Unit Size Expansion. The LUSE feature is available when the HP StorageWorks LUN
Manager product is installed, and allows a LUN, normally associated with only a single LDEV,
to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible for applications to access
a single large pool of storage.
M-VOL Main volume.
MCU Master control unit.
MU Mirror unit.
P-VOL Primary volume.
parity group A set of hard disk drives that have the same capacity and that are treated as one group. A parity
group contains both user data and parity information, which enables user data to be accessed
if one or more drives in the group is not available.
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.
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