HP StorageWorks XP Disk Array Configuration Guide for NonStop XP24000, XP20000, XP12000, XP10000, XP1024, XP128 (A5951 - 96223, September 2007)

Glossary
AL-PA Arbitrated loop physical address.
array group A group of 4 or 8 physical hard disk drives (HDDs) installed in an XP disk array
and assigned a common RAID level. RAID1 array groups consist of 4 (2D+2D)
or 8 HDDs (4D+4D). RAID5 array groups include a parity disk but also consist
of 4 (3D+1P) or 8 HDDs (7D+1P). All RAID6 array groups are made up of 8
HDDs (6D+2P).
command device A volume on the disk array that accepts XP Continuous Access Software or XP
Business Copy Software control operations which are then executed by the disk
array.
CU Control Unit. Contains LDEVs and is approximately equivalent to SCSI Target ID.
CVS Custom volume size. CVS devices (OPEN-x CVS) are custom volumes configured
using array management software to be smaller than normal fixed-size OPEN
system volumes. Synonymous with volume size customization (VSC). OPEN-V is
a CVS-based volume.
emulation modes The logical devices (LDEVs) associated with each RAID group are assigned an
emulation mode that makes them operate like OPEN system disk drives. The
emulation mode determines the size of an LDEV:
OPEN-3: 2.46 GB
OPEN-8: 7.38 GB
OPEN-9: 7.42 GB
OPEN-E: 13.56 GB
OPEN-L: 36 GB
OPEN-V: User-defined custom size
failover Using an alternate unit or path instead of a failed unit or path in order to continue
functioning.
FC Fibre Channel.
FCA Fibre Channel Adapter.
FC-AL Fibre Channel arbitrated loop.
FCSA Fibre Channel ServerNet Adapter
FCP Fibre Channel Protocol.
HBA Host bus adapter.
host mode Each port can be configured for a particular host type. These modes are
represented as two-digit hexadecimal numbers. For example, host mode 08
represents an HP-UX host.
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