Dell PowerEdge R530xd Glossary - Page 14

Within the Dell EqualLogic Group Manager environment,

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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 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 12

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persona
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.
pool
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.
pool administrator
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.
primary group
Within the Dell EqualLogic Group Manager environment, the group containing the original
volume in a replication partnership.
See secondary group.
primary volume
Within the Dell EqualLogic Group Manager environment, a
volume configured for replication
to a replication partner.
PS Series array
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.
PS Series group
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).
Public Services
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.
RAC
Remote Access Controller.
RAID
See Redundant Array of Independent Disks.
RAID 0
Data is striped across the available disks providing improved performance. RAID 0 does not
provide any data redundancy.
RAID 10
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.
RAID 5
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 50
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.
recovery volume
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.
Redundancy
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
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