HP P6000 Cluster Extension Software Administrator Guide (5697-0986, June 2011)

data movement P6000 Continuous Access provides for data movement services, such as data
backup, data migration, data distribution, and data mining.
data replication
mode
The operational mode of a DR group that indicates the capability of I/O to be
written to its source and/or its destination.
See also DR mode
default disk group The disk group that is created when an array is initialized. The minimum number
of disks the group can contain is eight. The maximum is the number of installed
disks.
destination vdisk A vdisk that is the recipient of replicated data from a source vdisk.
destination vdisk
access
A storage system's ability to allow host access to a destination vdisk. There are
two options:
• Disabled
• Read-only (write-protected)
Device Manager or
Element Manager
Web-based storage environment manager that enables users to configure and
monitor storage controllers. The device manager or element manager resides on
the management server.
disaster tolerance The capability for rapid recovery of user data from a remote location when a
significant event or disaster occurs at the local computing site. It is a special
combination of high-availability technology and services that can continue the
operation of critical applications in the event of a site disaster. Disaster-tolerant
systems are designed to allow applications to continue operating during the
disaster recovery period.
disk failure
protection
The three levels of disk failure protection are:
None: No protection is present.•
• Single: The capacity of one physical disk is reserved.
• Double: The capacity of two physical disks is reserved.
Disk failure protection occurs when the storage system sets aside reserved capacity
to take over the functionality of a failed or failing physical disk drive. In groups
with mixed capacity drives, the reserved capacity is based on the largest disk
in the disk group. The system must cover a failure in any drive, so it reserves
enough capacity to cover the largest failure that could happen.
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.
DLL Dynamic-link library.
DR Data replication.
DR group A logical group of virtual disks in a remote replication relationship with a
corresponding group on another array.
DR group direction The replication direction of a DR group. There are two states:
• Original (from Home)
• Reversed (failed over, or toward Home)
Glossary112