HP StorageWorks XP12000 Disk Array owner's guide (AE002-96029, October 2006)

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 d isk locations associated with a parity group.

disk type 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 (LDEVs) associated with each

RA ID group are assigned an emulation mode that

makes them operate like OPEN system disk drives.

The emulation m ode d etermines 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-K: Not available on this array

OPEN-L: 36 GB

OPEN-MNotavailableonthisarray

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, LUS

E 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 replacing it with an

alternative unit or 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 mirroring consistency.

FICON IBM mainframe Fiber Optic Connection.

HP StorageWorks XP12000 Disk Array