HP StorageWorks P9000 Virtualization Adapter Administrator Guide (5697-0680, October 2010)

Glossary
This glossary defines acronyms and terms used in this guide or related to this product and is not a
comprehensive glossary of computer terms.
disk array Two or more hard drives combined as a single logical unit for increased capacity,
speed, and fault-tolerant operation. Disk arrays are logically grouped into a
storage pool.
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.
DR Group Data replication group. A logical group of LUNs in a remote replication
relationship with a corresponding group on another array.
failback The act of returning ownership of controller resources (in an active-active
configuration) from a surviving controller to a previously failed (but now active)
controller. The resources include virtual disks, cache data, host ID information,
and LUNs and WWNs. Also known as recovery.
failover An operation that reverses replication direction so that the destination becomes
the source and the source becomes the destination. Failovers can be planned or
unplanned and can occur between DR groups, managed sets, fabrics or paths,
and array controllers.
HBA Host Bus Adapter.
HORCM A section of the RAID Manager instance configuration file that defines the disk
devices used as command devices by the RAID Manager to communicate with
the disk array.
HP StorageWorks
P9000
A Perl interface between VMware Site Recovery Manager (SRM) and HP
StorageWorks P9000 and XP Disk Arrays.
Virtualization
Adapter
LUN Logical unit number. A LUN results from mapping a SCSI logical unit number,
port ID, and LDEV ID to a RAID group. The size of the LUN is determined by the
emulation mode of the LDEV and the number of LDEVs associated with the LUN.
For example, a LUN associated with two OPEN-3 LDEVs has a size of 4,693
MB.
MPIO Multipath I/O. A fault-tolerance and performance enhancement technique where
there is more than one physical path between the CPU in a computer system and
its mass storage devices through the buses, controllers, switches, and bridge
devices connecting them.
protected site The datacenter containing the protected virtual machines from which data is
being replicated to the recovery site.
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