HP XP20000/XP24000 HP StorageWorks XP24000/XP20000 Disk Array Site Preparation - Page 70

OPEN-K: Not available

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CS CSR CU CVS disk group disk type DKA DKC DKU DRR emulation mode EPO ESCON ESD expanded LUN ExSA are numbered sequentially. The disk array supports a certain number of CUs, depending on the disk array model. Each CU can manage multiple LDEVs. Therefore, to uniquely identify a particular LDEV requires both the CU number and the LDEV number. Critical Support. Customer self repair. Control unit. 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). A named group of disks selected from all the available disks in a disk array. One or more virtual disks can be created from a disk group. Also refers to the physical disk locations associated with a parity group. The manufacturing ID written into the physical disk controller firmware. In most cases, the disk type is identical to the disk model number. Disk adapter. Disk controller. Disk cabinet unit. The array cabinet that houses the physical disks. Disk recovery and restore unit. The unit responsible for data recovery and restoration in the event of a cache failure. The 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-K: Not available OPEN-L: 36 GB OPEN-M Not available OPEN-V: User-defined custom size Emergency power-off. Enterprise systems connection An optical interface used to connect the mainframe to the control unit; a predecessor to FICON. Electrostatic discharge. The emission of a potentially harmful static electric voltage as a result of improper grounding. A LUN is normally associated with only a single LDEV. The LUN Size Expansion (LUSE) feature allows a LUN to be associated with 2-36 LDEVs. Essentially, LUSE makes it possible for applications to access a single large pool of storage. LUSE is an optional feature. Extended serial adapter. 70 Glossary

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are numbered sequentially. The disk array supports a certain number of CUs,
depending on the disk array model. Each CU can manage multiple LDEVs.
Therefore, to uniquely identify a particular LDEV requires both the CU number
and the LDEV number.
CS
Critical Support.
CSR
Customer self repair.
CU
Control unit.
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).
disk group
A named group of disks selected from all the available disks in a disk array.
One or more virtual disks can be created from a disk group. Also refers to the
physical disk locations associated with a parity group.
disk type
The manufacturing ID written into the physical disk controller firmware. In most
cases, the disk type is identical to the disk model number.
DKA
Disk adapter.
DKC
Disk controller.
DKU
Disk cabinet unit. The array cabinet that houses the physical disks.
DRR
Disk recovery and restore unit. The unit responsible for data recovery and
restoration in the event of a cache failure.
emulation mode
The 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-K: Not available
OPEN-L: 36 GB
OPEN-M Not available
OPEN-V: User-defined custom size
EPO
Emergency power-off.
ESCON
Enterprise systems connection An optical interface used to connect the mainframe
to the control unit; a predecessor to FICON.
ESD
Electrostatic discharge. The emission of a potentially harmful static electric voltage
as a result of improper grounding.
expanded LUN
A LUN is normally associated with only a single LDEV. The LUN Size Expansion
(LUSE) feature allows a LUN to be associated with 2-36 LDEVs. Essentially, LUSE
makes it possible for applications to access a single large pool of storage. LUSE
is an optional feature.
ExSA
Extended serial adapter.
Glossary
70