HP StorageWorks P9000 Cluster Extension Software Administrator Guide (TB534-96009, February 2011)

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 (VSC). OPEN-V is a CVS-based volume.
DKC Disk controller.
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 P9000 or XP Continuous Access 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.
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.
LVM Logical Volume Manager.
MINAP Minimum active paths.
MMC Microsoft Management Console.
MNS Majority node set.
MSCS Microsoft Cluster Service.
MU Mirror unit.
NIC Network interface card. A device that handles communication between a device and other devices
on a network.
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.
PCF Product Configuration File.
108 Glossary