HP StorageWorks Continuous Access EVA Administrator Guide (T3687-96043, December 2005)

HP Continuous
Access EVA
HP Continuous Access EVA is a storage-based HP StorageWorks product
consisting of two or more arrays performing disk-to-disk replication, along with
the management user interfaces that facilitates co n figuring, monitoring, and
maintaining the rep licating capabilities of the arrays.
Home The DR group that is the preferred source in a replication relationship. By default,
Home is the original source, but it can be set to the destination DR group.
host A computer that runs user applications and uses the information stored on an
array.
host volume Storage capacity that is defined and mountable by a host operating system. In
HP Replication Solutions Manager, host volumes are disks or volumes that are
reported by an enabled host.
initialization Aconfiguration step that binds the controllers together and establishes
preliminary data structures on the array. Initialization also sets up the first disk
group, called the default disk group, and makes the array ready for use.
LUN Logical unit number. Logical units are the components within SCSI targets that
execute I/O commands. Virtual disks that are presented to hosts correspond to
logical units and are identified by LUN IDs. See also present.
managed set Selected resources grouped together for convenient m anag ement. For example,
you can create a managed set to manage all DR groups whose sources reside
in the same rack.
management
server
A server where HP StorageWorks Enterprise Virtual Array (EVA) management
software is installed, including HP StorageWorks Command View EVA and
HP StorageWorks Replic ation Solutions Manager, if used. A dedicated
management server runs EVA managem ent software exclusively. Other
management servers are a general-purpose server, an H P ProLiant Storage
Server (NAS) , and an HP OpenView Storage Management Appliance.
merge The act of transferring log contents to the destination virtual disk to synchronize
the source and destination.
mount point The file system path and directory where a h ost volume is accessed.
normaliza tion The initial full copy that occurs between source and destination virtual disks.
(to) present The array controller act of making a virtual disk accessible to a host computer.
remote copy A replica virtual disk on the destination array.
resource An object in the Replication Solutions Manager navigation pane; namely, DR
groups, enabled hosts, host volumes, managed sets, storage systems, and virtual
disks. Replication is performed using these resources.
SAN Storag e area n et work, a network of storage devices and the initiators that
store and retrieve information on those devices, including the communication
infrastructure.
snapclone A copy that begins as a fully allocated snapshot and becomes an independent
virtual disk. Applies only to the HP StorageWorks EVA.
snapshot A nearly instantaneous copy of the contents of a virtual disk created without
interruption of operations on the source virtual disk. Snapshots are typically
used for short-term tasks such as backups.
source (Home) A descriptive term for the virtual disk, DR group, or virtual array where an
original I/O is stored before replication. See also destination.
68
Glossary