HP StorageWorks 200 Storage Virtualization System site preparation guide (AE071-96003, October 2006)

control unit To organize the storage space attached to the DKC, you can group similarly
configured logical devices (LDEVs) with unique control unit images (CUs).
CUs are numbered sequentially. The system supp orts a c ertain number of
CUs, depending on the system model. Each CU can manage multiple LDEVs.
Therefore, to uniquely identify a particular LDEV requires both the CU number
and the LD EV number.
CU Control unit.
CVS Custom volume size. CVS devices (OPEN-x CVS) are custom volumes configured
using system management software to be smaller than normal fixed-siz e OPEN
system volumes. Synonymous with volume size customization (VSC).
disk adapter
(DKA)
Synonymous with the term ACP.
disk unit (DKU) The system hardware that houses the system physical disks.
disk controller
(DKC
)
The system hardware that houses the channel adapters and service processor
(SVP
).
disk recovery and
restore unit (DRR)
The unit responsible for data recovery and restoration in the event of a cache
failure.
disk group The physical disk locations associated with a parity group.
disk t ype The manufacturing label burned into the physical disk controller firmware. In
most cases, the disk type is identical to the disk model number.
emulation modes The logical devices (LD EVs) associated with each R A ID group are
assigned an emulation mo de that makes them op erate like OPEN
system disk drives. The emulation mod e determines the size of an LD EV.
OPEN-3: 2.46 GB
OPEN-8: 7.38 GB
OPEN-9: 7.42 GB
OPEN-E: 13.56 GB
OPEN-K: Not available on this system
OPEN-L: 36 GB
OPEN-M: Not available on this system
OPEN-V: User-defined custom size
EPO Emergency power off.
ESCON Enterprise System Connection (the IBM trademark for optical channels).
expanded LUN A LUN is normally associated with only a single LDEV. The LUSE feature allows
a LUN to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible
for applications to access a single large pool of storage. The LUSE feature is
available when the HP StorageWorks LUN Configuration Manager product is
installed.
ExSA Extended serial adapter.
failover Disconnecting a failed unit or path and replac
ingitwithanalternativeunitor
path in order to continue functioning.
FC Fibre Channel.
FC-AL Fibre Channel arbitrated loop.
FCP Fibre Channel Protocol.
fence level A level for selecting rejection of a write I/O request from the host according to
the condition of mi rroring consistency.
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Glossary