HP P9000 Tiered Storage Manager Software 7.2 CLI Reference Guide

Glossary
This glossary defines the special terms used in this document.letter.
host group A group of hosts with WWN HBAs that are allowed to issue I/Os to specified
volumes. You can specify multiple volumes. Host groups are managed by LUN
Manager for the storage.
host storage
domain
A host group. In this manual, host storage domain means the same thing as host
group.
HP StorageWorks
P9000 Thin
Provisioning
A function that allocates a larger virtual volume than the actual capacity to a
host and uses the required actual capacity for data write requests.
LDEV (Logical
Device)
A logical volume unit made up by combining multiple physical drives.
LDEV selection
rules
Rules applied when you select a migration target. You can set rules for each
migration group.
The LDEV selection rules are as follows:
- Parity group avoidance rule
- Parity group selection rule
logical DKC A name for managing a volume when volumes are managed by 64K-LDEV unit
in HP P9500 or XP24000/XP20000.
logical DKC
number
The number assigned to identify a logical DKC.
logical DKC serial
number
The device identification number logically assigned to a logical DKC. This number
is displayed as logical-DKC-number + serial-number.
LU (logical unit) A logical unit in a storage system.
LUSE (LU size
expansion)
A function that combines LUs to enlarge volume capacity.
normal volume In Tiered Storage Manager software, a normal volume is a volume that is not a
virtual or pool volume.
parity group A group of physical drives in a RAID configuration in a storage system.
parity group
avoidance rule
This rule does not select, as a migration target parity group, a parity group that
contains an LDEV that belongs to a specific migration group.
parity group
selection rule
This is the rule specified when you want to select a migration target after
considering the usage status of parity groups. This rule has the following three
options:
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