HP XP Racks - Manual (Page 150)

Glossary
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.
BC Z The version of Business Copy that supports mainframe volumes.
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-J Z The version of Continuous Access Journal that supports mainframe volumes.
Cnt Ac-S P9000 or XP Continuous Access Synchronous software.
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.
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.
DFSMS Data Facility Storage Management Subsystem.
DKA Disk adapter.
DKC Disk controller.
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
Fibre Channel A data transfer architecture designed for mass storage devices and other peripheral devices that
require high bandwidth.
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.
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,
150 Glossary