HP XP P9000 Performance Advisor Software - Manual (Page 412)

Command View
(CV) Replaced by the Command View Advanced Edition Suite Software.
Command View AE
(CV AE) The Command View Advanced Edition Suite Software replaces the XP Command View Software
to manage the XP and P9000 disk arrays.
Consistency Group
ID (CTG) A Group ID which guarantees consistency in the sequence of asynchronous data transfers for a
remote copy volume group.
Continuous Access
Journal (Cnt Ac-J) The Continuous Access Journal Software is an asynchronous mirroring program similar to the
Continuous Access Asynchronous, except that the transactions to be written to the secondary disk
array are maintained in a disk-based journal file. This provides better performance for the
secondary disk array systems that are not highly available or that may be subject to bandwidth
contention from other applications.
Continuous Access
Synchronous (Cnt
Ac-S) The Continuous Access Synchronous Software provides remote replication between the disk arrays
that belong to the P9000 and the XP families.
Control Unit
(Command Unit,
CU) The storage space attached to a DKC can be organized by grouping similarly configured logical
devices (LDEVs) with unique CU images. The CUs are numbered sequentially. An XP or a P9000
disk array supports a certain number of CUs depending on the disk array model. Each control
unit can manage multiple LDEVs. Therefore, to uniquely identify a particular LDEV, you need the
CU and the LDEV numbers.
CSV Comma-separated value.
D
DASD Fast Write
(DFW) The DFW is the function of a storage controller that allows caching of active write data without
exposure of data loss. This is achieved by journaling of the active write data in the NVS.
Device Special File
(DSF) In the non windows systems, the DSF is an interface for a device driver that appears in a file
system as if it were an ordinary file. In the Windows systems, the DSF allows the software to
interact with a device driver using the standard input or the output system calls.
Disk Adapter
(DKA) The DKA is a PCB in the XP and the P9000 disk arrays. It manages the data transfer between
the cache and the physical drives in the backend.
In an XP disk array, the DKA is one of the two PCB types that contains the MPs.
Disk Controller
(DKC) The array enclosure that contains the channel adapters and service processor (SVP).
Disk Processor
(DKP) In the XP disk arrays, the MP that resides on a DKA is addressed as the DKP.
DKPs does not exist in the P9000 disk arrays. All the MPs/DKPs form part of the MP blades in
the P9000 disk arrays.
DKU Disk cabinet unit. The array cabinet that houses the physical disks.
E
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
External Storage An external storage that is connected to an XP or a P9000 disk array.
412 Glossary