HP Replication Adapter for VMware vCenter Site Recovery Manager Administrator Guide (5697-2491, February 2013)

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
XP Virtualization
Adapter
A Perl interface between VMware Site Recovery Manager (SRM) and HP StorageWorks Disk
Arrays.
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.
P-VOL Primary volume.
point-in-time copy A generic term meaning a static point-in-time copy of a volume, typically used for backup.
protected site The datacenter containing the protected virtual machines from which data is being replicated to
the recovery site.
RAID Redundant array of independent disks. A RAID level is one of the ways that disk drives are
grouped together to improve performance, data availability, or reliability, or both. RAID levels
are defined from RAID0 to RAID6. HP StorageWorks Disk Arrays in the XP product family support
RAID1, RAID5 and RAID6.
recovery site The datacenter containing the virtual machines that are recovered and perform work while the
protected site is unavailable.
S-VOL Secondary or remote volume. The copy volume that receives the data from the primary volume.
SRM VMware Site Recovery Manager.
WWN World Wide Name. A unique identifier in a Fibre Channel or SAS storage network. The first
three bytes are derived from an IEEE Organizationally Unique Identifier (OUI), which identifies
the manufacturer or vendor. The remaining five bytes are assigned by the vendor.
52 Glossary