HP StorageWorks XP24000/XP20000 Continuous Access Software User Guide (T5278-96046, May 2011)

Glossary
A
ADDR, Adr Address. A data structure or logical convention used to identify a unique entity, such as a particular
process or network device.
ATM Asynchronous transfer mode.
C
C/T Consistency time.
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).
CKD Check key data. An IBM file structure standard for disk volumes.
CNT Computer network technologies.
CU Control unit.
CVS Custom volume size.
D
DASD Direct access storage device.
DB2 Database 2.
DFSMS Data Facility Storage Management Subsystem.
DR/BC Disaster recovery/Business continuation.
DWL Duplex write line.
E
ExSA Extended serial adapter.
F
FBA Fixed-block architecture.
H
HBA Host bus adapter.
I
IMPL Initial microprogram load.
IMS Information management system.
IOCDS I/O control data set. A mainframe definition of information related to I/O and peripheral devices.
L
LUN Logical unit (also called device emulation or device type).
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,
to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible for applications to access
a single large pool of storage.
M
MCU Main control unit.
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