HP XP Continuous Access Software - Manual (Page 403)

Glossary 403
CU Control Unit. Contains LDEVs and is approximately equivalent to SCSI
Target ID.
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 group The physical disks associated with a parity group.
disk type The manufacturer’s label in the physical disk controller firmware. In most
cases, the disk type is identical to the disk model number.
DKA
(disk adapter)
Synonymous with the ACP.
DKC
(disk controller unit)
The array cabinet that houses the channel adapters and service processor
(SVP).
DKU
(disk cabinet unit)
The array cabinets that house the disk array physical disks.
DRR
(disk recovery and
restore unit)
The unit responsible for data recovery and restoration in the event of a
cache failure. Located on the ACP.
daemon A process in the UNIX system that waits for events and that does not
disappear after an event is carried out.
DW Duplex write.
DWL Duplex write line.
emulation mode The logical devices (LDEVs) associated with each RAID group are
assigned an emulation mode that makes them operate like OPEN system
disk drives of various sizes. The emulation mode determines the volume’s
capacity.
OPEN-3: 2.46 GB
OPEN-8: 7.38 GB
OPEN-9: 7.42 GB
OPEN-E: 13.56 GB
OPEN-L: 36 GB
OPEN-V: User-defined custom size