HP StorageWorks XP12000 - Disk Array Site Preparation Manual page 66

channel processor The processors located on the channel adapter (CHA). Synonymous with CHIP.
(CHP)
command device A volume on the disk array that accepts Continuous Access or Business Copy
control operations which are then executed by the disk array.
control unit To organize the storage space attached to the 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, to uniquely identify a particular LDEV requires both the CU number
and the LDEV number.
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).
disk adapter (DKA) Synonymous with the term ACP.
disk unit (DKU) The array hardware that houses the disk array physical disks.
disk controller The array hardware that houses the channel adapters and service processor
(DKC) (SVP).
disk recovery and The unit responsible for data recovery and restoration in the event of a cache
restore unit (DRR) failure.
disk group The physical disk locations associated with a parity group.
disk type The manufacturing label burned into the physical disk controller firmware. In
most cases, the disk type is identical to the disk model number.
emulation modes The logical devices (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.
OPEN-3: 2.46 GB
OPEN-8: 7.38 GB
OPEN-9: 7.42 GB
OPEN-E: 13.56 GB
OPEN-K: Not available on this array
OPEN-L: 36 GB
OPEN-M Not available on this array
OPEN-V: User-defined custom size
EPO Emergency power-off.
ESCON Enterprise System Connection (the IBM trademark for optical channels).
expanded LUN A LUN is normally associated with only a single LDEV. The LUSE feature allows
a LUN to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible
for applications to access a single large pool of storage. The LUSE feature is
available when the HP StorageWorks LUN Configuration Manager product is
installed.
ExSA Extended serial adapter.
66 Glossary