Glossary
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CKD
Count key data.
CL
Cluster.
command device
A volume on the disk array that accepts CA or BC control operations which
are then executed by the disk array.
configuration file
A file that defines the pair configurations.
consistency group ID
(CTGID)
The group identifier for which the disk array guarantees the sequence of
asynchronous data transfer for the asynchronous CA volume group.
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.
CSA
Canadian Standards Association.
CU
Control unit.
CVS
Custom volume size (also called virtual LVI).
daemon
A process that runs in the background and performs a specific operation at
predefined times in response to certain events.
DASD
Direct access storage device.
DCR
Dynamic cache residency.
DE
HP StorageWorks Data Exchange XP.
DFDSS
Data Facility Dataset Services.
DFSMS
Data Facility System Managed Storage.
DFW
DASD fast write.
disk adapter (DKA)
Synonymous with the term ACP.
disk control frame
(DKC)
The disk control frame (DKC) refers to the array hardware that houses the
channel adapters and service processor (SVP).
