HP XP P9000Watch and HP XP P9000Sketch Reference Guide for HP XP P9000 Performance Advisor v5.5 (T1789-96341, February 2013)

R
RAID group A group of disks configured to provide enhanced redundancy, performance, or both. Specifically,
four or eight physical hard disk drives (HDDs) installed in a disk array and assigned a common
RAID level.
RAID Manager
Library (RML,
RMLIB)
The RAID Manager Library is an API library that enables third-party software products to directly
operate some of the functions on the P9000 and XP disk arrays.
Read/Write (R/W) Read-write access.
S
S-VOL Secondary or remote volume. The copy volume that receives the data from the primary volume.
SAN Storage area network. A network of storage devices available to one or more servers.
Shared Memory
(SM)
The shared memory in an XP disk array stores shared information about the XP subsystem and
the cache control information.
The shared memory in a P9000 disk array stores shared information about the P9000 subsystem
and the cache control information.
This type of information is used for the exclusive control of the subsystem. Similar to the cache,
the shared memory is controlled as two areas of memory and is fully non-volatile (sustained for
approximately seven days).
Snapshot The snapshot is a business copy volume type that depicts a point-in-time copy of the original
primary volume.
Storage Logical
Partition (SLPR)
NOTE: The SLPR component is applicable only for the XP disk arrays. It does not exist in the
P9000 disk arrays. As a result, the SLPR-related data is not displayed in P9000 Performance
Advisor for the P9000 disk arrays.
The SLPR is a partition of the RAID500 to which the host ports (1 or more) and the CLPRs (1 or
more) are assigned. The SLPR0 will always exist (cannot be deleted). Sometimes, the SLPR acronym
includes an additional word. For example, Storage administrator Logical Partition or Storage
management Logical Partition, both mean the same. The purpose of the SLPR is to allow multiple
administrators to manage a subsystem without the risk of causing mistakes that can destroy another
user's volumes, or reduce other user's expected performance by using more components (e.g.
cache) than required.
SVP Service processor. A notebook computer built into the disk array. The SVP provides a direct
interface to the disk array and used only by the HP service representative.
T
Thin Provisioning
(ThP, TP)
Using the thin provisioning, you can operate with a global pool of LDEVs that are not assigned
to a physical storage. The XP and the P9000 disk arrays add virtual capacity from the pool of
LDEVs as and when the data is written, and only at that time is the physical capacity assigned
to the LDEVs and used for storage purpose.
W
World Wide Name
(WWN) Group
The world wide name group provides access for every host in the specified WWN group to a
specified logical unit or group of units. This is part of the LUN Security feature.
WWN World Wide Name. A unique identifier assigned to a Fibre Channel device.
78 Glossary