HP XP24000, XP20000 manual Glossary, 167

Glossary

A
AMS	Adaptable module storage.
ATA	Advanced Technology Attachment standard.
C
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).
CV	Custom-sized volume.
E
ESCON	Enterprise systems connection An optical interface used to connect the mainframe to the control
	unit; a predecessor to FICON.
ExG	External volume group.
F
FC	Fibre Channel. A network technology primarily used for storage networks.
FICON	Fibre connectivity. Hardware that connects the mainframe to the control unit.
H
HDD	Hard disk drive.
L
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.
LDKC	Logical disk controller.
LUN	Logical unit number.
M
MCU	Main control unit.
MIH	Missing interrupt handler.
O
OTP	Online transaction processing.
P
P-VOL	Primary volume.
PB	Petabyte. 1 PB (petabyte) = 1,0005 bytes (hard disk storage) or 1 PB (petabyte) = 1,024 TB or
	1,0245 bytes (logical storage).
PCB	Printed circuit board.
R
RCU	Remote control unit.

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