Glossary - HP StorageWorks P9000 Reference Manual

Glossary

AL Arbitrated loop.
allocation The ratio of allocated storage capacity versus total capacity as a percentage. Allocated storage
refers to those logical devices (LDEVs) that have paths assigned to them. Allocated storage capacity
is the sum of the storage of these LDEVs. Total capacity is the sum of the capacity of all LDEVs
on the disk array.
BC P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies
in the disk array.
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.
CLI Command-line interface. An interface comprised of various commands which are used to control
operating system responses.
CLPR Cache logical partition.
CNT Computer network technologies.
Cnt Ac-J P9000 or XP Continuous Access Journal software.
Cnt Ac-S P9000 or XP Continuous Access Synchronous software.
command device A volume in the disk array that accepts Continuous Access, Business Copy, or P9000 for Business
Continuity Manager control operations, which are then executed by the array.
CT group Consistency group.
CTGID Consistency group ID. The group identifier used to identify a group of volumes in the P9500 Disk
Array being replicated using asynchronous technology. The consistency group guarantees the
sequencing of updates to the secondary 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.
CVS Custom volume size. CVS devices (OPEN-x CVS or 3390-x CVS) are custom volumes configured
using array management software to be smaller or larger than normal fixed-size OPEN or
mainframe system volumes. Synonymous with volume size customization (VSC). OPEN-V is a
CVS-based volume.
daemon A process in UNIX systems that runs in the background, without any direct user console or terminal
interaction.
DKA Disk adapter.
DKC Disk controller.
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 data transfer architecture designed for mass storage devices and other peripheral devices that
require high bandwidth.
GUID Globally unique identifier.
HDD Hard disk drive.
HORCM_CMD A section of the RAID Manager instance configuration file that defines the disk devices used as
command devices by RAID Manager to communicate with the disk array.
HORCM_DEV A section of the RAID Manager instance configuration file that describes the physical volumes
corresponding to the paired volume names.
HORCM_INST A section of the RAID Manager instance configuration file that defines how RAID Manager groups
link to remote RAID Manager instances.
HORCM_LDEV A section of the RAID Manager instance configuration file that specifies stable LDEV and serial
numbers of physical volumes that correspond to paired logical volume names.
202 Glossary