HP StorageWorks XP Cluster Extension Software Administrator Guide (T1656-96035, April 2010)

Glossary
CHA Channel adapter. A device that provides the interface between the array and
the external host system. Occasionally, this term is used synonymously with the
term channel host interface processor (CHIP).
CLI Command-line interface. An interface comprised of various commands which
are used to control operating system responses.
command device A volume on the disk array that accepts HP StorageWorks Continuous Access
or HP StorageWorks Business Copy control operations which are then executed
by the array.
CU Control unit.
CVS Custom volume size. CVS devices (OPEN-x CVS) are custom volumes configured
using array management software to be smaller than normal fixed-size OPEN
system volumes. Synonymous with volume size customization (VCS).
DLL Dynamic-link library.
DSM Device Specific Module.
failover Disconnecting a failed unit or path and replacing it with an alternative unit or
path to continue functioning.
FC Fibre Channel. A network technology primarily used for storage networks.
fence level A method of setting rejection of XP Continuous Access Software write I/O requests
from the host according to the condition of mirroring consistency.
GUI Graphical User Interface.
GUID Globally unique identifier.
HACMP High Availability Cluster Multi-Processing. An IBM application for AIX software.
HBA Host bus adapter.
heartbeat A periodic synchronization signal issued by cluster software or hardware to
indicate that a node is an active member of the cluster.
LD, LDEV Logical device. An LDEV is created when a RAID group is carved into pieces
according to the selected host emulation mode (that is, OPEN-3, OPEN-8,
OPEN-9). The number of resulting LDEVs depends on the selected emulation
mode. The term LDEV is also known as term volume.
LU Logical unit.
LUN Logical unit number.
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