keypair
T
wo mathematically-related cryptographic keys: a private key and its associated public key.
L
LBA
logical block address
LCP
local control port; link control processor
LD
local directory; logical device
LDAP
lightweight directory access protocol
LDEV
logical device
LDKC
See logical disk controller (LDKC).
LDM
Logical Disk Manager
license key
A speciî ´c set of characters that unlocks an application and allows it to be used.
local control port (LCP)
A serial-channel (ESCON) port conî ´gured to receive I/Os from a host or remote I/Os from a TrueCopy
main control unit (MCU).
local copy
See in-system replication.
local storage system
A storage system connected to the management client.
logical device (LDEV)
An individual logical data volume (on multiple drives in a RAID conî ´guration) in the storage system.
An LDEV may or may not contain any data and may or may not be deî ´ned to any hosts. Each LDEV
has a unique identiî ´er or "address" within the storage system composed of the logical disk
controller (LDKC) number, control unit (CU) number, and LDEV number. The LDEV IDs within a
storage system do not change.An LDEV formatted for use by mainframe hosts is called a logical
volume image (LVI). An LDEV formatted for use by open-system hosts is called a logical unit (LU).
logical disk controller (LDKC)
A group of 255 control unit (CU) images in the RAID storage system that is controlled by a virtual
(logical) storage system within the single physical storage system. For example, the Hitachi Universal
Storage Platform V storage system supports two LDKCs, LDKC 00 and LDKC 01.
logical partition (LPAR)
A subset of a system's hardware resources that is virtualized as a separate system. For a storage
system, logical partitioning can be applied to cache memory and/or storage capacity.
Glossary
System Administrator Guide for VSP Gx00 models and VSP Fx00 models 354
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