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110 HP StorageWorks Disk Arrays XP128/XP1024: Owner’s Guide
disk adapter (DKA) Synonymous with the term ACP.
disk control frame
(DKC)
The disk control frame (DKC) refers to the array hardware that houses the
channel adapters and service processor (SVP).
disk array frame
(DKU)
The disk array frame (DKU) refers to the array hardware that houses the
physical disks in the array.
disk recovery and
restore unit (DRR)
The unit located on the ACP that is 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 type The manufacturing label burned into the physical disk controller firmware.
In most cases, the disk type is identical to the disk model number.
DMP Dynamic multipathing.
dr Drive.
DSF Device support facilities.
DW Duplex write.
DWL Duplex write line.
ECKD Extended count key data.
EFS The IRIX standard file system.
emulation modes The logical devices (LDEVs) associated with each RAID group can have
one of the following emulation modes. These modes change the behavior of
the disks and determine their size.
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 all XP arrays
OPEN-L: 36 GB
OPEN-M: Not available on all XP arrays
OPEN-V: User-defined custom size