HP XP Array Manager Software - Manual (Page 169)

Glossary
ACP Array control processor.
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).
CHP Channel processor. The processors located on the CHA. Synonymous with CHIP.
CLPR Cache logical partition.
CU Control unit.
DASD Direct-access storage device.
DFW DASD fast write.
DKA Disk adapter.
See also
ACP
DKCMAIN Disk controller main.
DKP Disk processor.
DRR Data recovery and reconstruction processor.
ESCON Enterprise systems connection An optical interface used to connect the mainframe
to the control unit; a predecessor to FICON.
LD, LDEV Logical device. An LDEV is created when a RAID group is carved into pieces
according to the selected host emulation mode (that is, OPEN-3, OPEN-8,
OPEN-9). The number of resulting LDEVs depends on the selected emulation
mode. The term LDEV is also known as term volume.
LU Logical unit.
LUN Logical unit number.
NVS Nonvolatile storage.
P-DEV Physical device.
P-VOL Primary volume.
SM Shared memory.
SMPL Simplex.
XP24000/XP20000 Performance Monitor User Guide 169