HP XP P9000 Auto LUN Software - Manual (Page 68)

Glossary
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.
BC P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies
in the disk array.
BC Z The version of Business Copy that supports mainframe volumes.
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 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.
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 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.
DKA Disk adapter.
DKC Disk controller.
DKU Disk Unit.
ESW Express switch adapter.
FC-AL Fibre Channel arbitrated loop.
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.
FICON Fibre connectivity. An FC layer 4 protocol used to map mainframe channel command and data
I/O operations onto standard FC infrastructure, protocol, and FC services.
HBA Host bus adapter.
HDD Hard disk drive.
LDKC Logical disk controller.
LUN Logical unit number. A LUN results from mapping a logical unit number, port ID, and LDEV ID to
a RAID group. The size of the LUN is determined by the emulation mode of the LDEV and the
number of LDEVs associated with the LUN.
68 Glossary