Dell DR4000 Glossary page 14

persona
pool
pool administrator
primary group
primary volume
PS Series array
PS Series group
Public Services
RAC
RAID
RAID 0
RAID 10
RAID 5
RAID 50
recovery volume
Redundancy
12
A server environment captured on disk: the operating system, optional Dell AIM agent
software, and the network and other settings required to run an application on a host in the
Dell AIM environment.
Storage space in a SAN available for use by volumes. In Dell Compellent Enterprise Storage
Manager and Dell Compellent Storage Center, this is equivalent to the total space in the
SAN. In Dell EqualLogic PS Series arrays, this is equivalent to the total space on the
members of the specific pool.
An account on a Dell EqualLogic PS Series group that has permission to manage objects
only in a specific pool or set of pools for a group. Compare to group administrator.
Within the Dell EqualLogic Group Manager environment, the group containing the original
volume in a replication partnership. See secondary group.
Within the Dell EqualLogic Group Manager environment, a volume configured for replication
to a replication partner.
A single Dell EqualLogic iSCSI storage unit, usually configured as a Dell EqualLogic PS
Series group. You can join multiple PS Series arrays into a larger PS Series group and
manage them as a single iSCSI SAN.
An iSCSI storage entity comprised of one or more Dell EqualLogic PS Series storage arrays
that you access through a single IP address and manage as a storage area network (SAN).
In the context of Dell AIM, the Controller Services virtual IP address that you use to connect
to the Console or CLI on the active Controller.
Remote Access Controller.
See Redundant Array of Independent Disks.
Data is striped across the available disks providing improved performance. RAID 0 does not
provide any data redundancy.
Data is striped across available disk drives and mirrored, providing data availability and
improved performance. Maintains a minimum of one full copy of all data on the volume. RAID
10 provides optimum Read / Write performance, increased probability of withstanding
multiple failures, and the quickest restoration of data.
Maintains a logical copy of the data using a mathematically derived rotating parity stripe.
The parity stripe is derived from the data stripes. This method has less overhead for the
redundant information than RAID 10 however write performance is slower than RAID 10 due
to the calculation of the parity stripe for every write. Read performance is similar to RAID 10.
RAID level 50 is a combination of RAID level 5 and RAID level 0. RAID 50 includes both parity
and disk striping across multiple drives.
A volume created for the purpose of recovering data. In Dell EqualLogic PS Series arrays, a
recovery volume is created by promoting an inbound replica set as part of a failover
operation. You can also create recovery template volumes and recovery thin clones. In Dell
Compellent Storage Center, a view volume is created from a replay. See replica, View
Volume, Replay.
The duplication of information or hardware equipment components to ensure that if a
primary resource fails, a secondary resource can take over its function. Dell Compellent
Storage Center provides redundancy for each component so that there is no single point of