HP XP P9500 Owner's Manual page 102

RAID group
RAID level
RAID Manager
RAID1-level data
storage
RAID1/5
RAID5-level data
storage
RAID6-level data
storage
RCU
Remote Web
Console
RM
SAS
SCP
SIM
SMPL
SSB
SSD
SSVPMN
SVP
synchronous
TID
UID
V-VOL
VOL, vol
volume
WLM
WWN
102 Glossary
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A group of disks configured to provide enhanced redundancy, performance, or both. Specifically,
four or eight physical hard disk drives (HDDs) installed in a P9000 or XP disk array and assigned
a common RAID level. In an XP disk array this is also referred to as an array group or parity
group.
A configuration of disk drives that uses striping, mirroring, and parity to improve performance
and data availability and reliability.
The CLI configuration and replication tool for the P9000 or XP disk array that system administrators
can use to enter RAID Manager commands from open-system hosts to perform Continuous Access,
Business Copy, Database Validator, and Data Retention operations, as well as provisioning
commands on logical devices.
A RAID that consists of at least two drives that use mirroring (100 percent duplication of the
storage of data). There is no striping. Read performance is improved since either disk can be
read at the same time. Write performance is the same as for single disk storage.
Specific RAID architectures.
A RAID that provides data striping at the byte level and also stripe error correction information.
RAID5 configurations can tolerate one drive failure. Even with a failed drive, the data in a RAID5
volume can still be accessed normally.
A RAID that provides data striping at the byte level and also stripe error correction information.
RAID6 configurations can tolerate two drive failures. Even with two failed drives, the data in a
RAID6 volume can still be accessed normally. RAID6 read performance is similar to RAID5, since
all drives can service read operations, but the write performance is lower than that of RAID5
because the parity data must be updated on multiple drives.
Remote control unit.
A browser-based program installed on the SVP that allows you to configure and manage the disk
array.
HP StorageWorks RAID Manager.
Serial Attached SCSI.
State-change-pending.
Service information message.
Simplex.
Sense byte.
Solid state disk. A high-performance storage device that contains no moving parts. An SSD
contains DRAM or EEPROM memory boards, a memory bus board, a CPU, and a battery card.
Sub Service Processor Monitor.
Service processor. A computer built into a disk array. The SVP, used only by an HP service
representative, provides a direct interface to the disk array.
Describes computing models that perform tasks in chronological order without interruption. In
synchronous replication, the source waits for data to be copied at the destination before
acknowledging that it has been written at the source.
Target ID.
Unit identification.
Virtual Volume.
Volume.
Volume on disk. An accessible storage area on disk, either physical or virtual.
Workload manager.
World Wide Name. A unique identifier assigned to a Fibre Channel device.
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