HP XP RAID Manager Software - Manual (Page 177)

Glossary
AL Arbitrated loop.
AL-PA Arbitrated loop physical address. A 1-byte value that the arbitrated loop topology uses to identify
the loop ports. This value becomes the last byte of the address identifier for each public port on
the loop.
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.
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.
CLPR Cache logical partition.
Cnt Ac-J Z The version of Continuous Access Journal that supports mainframe volumes.
Cnt Ac-S Z The version of Continuous Access Synchronous that supports mainframe volumes.
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.
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.
C-Track Continuous Track. An HP software program that detects internal hardware component problems
on an array and automatically reports them to HP Support Services.
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.
DKU Disk Unit.
emulation mode The LDEVs associated with each RAID group are assigned an emulation mode that makes them
operate like OPEN system disk drives. The emulation mode determines the size of an LDEV or
volume.
OPEN-V: User-defined custom size
3390-3/3R: 2.838 GB
3390-9: 8.514 GB
3390-L: 27.844 GB
3390-M: 55.689 GB
3380-3 2.377 GB
FC-AL Fibre Channel Arbitrated Loop.
Fibre Channel A data transfer architecture designed for mass storage devices and other peripheral devices that
require high bandwidth.
Fibre Channel Loop An enclosure that provides twelve-port central interconnect for Fibre Channel Arbitrated Loops
following the ANSI Fibre Channel drive enclosure standard.
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