HP 3PAR Operating System Software - Manual (Page 423)

iSCSI adaptor An iSCSI PCI host bus adapter (HBA) located in a controller node. The iSCSI adapter connects
a controller node to a host.
iSCSI name A value used to identify iSCSI channel devices on an arbitrated loop.
iSNS Internet Storage Name Service. Protocol that allows automated discovery, management, and
configuration of iSCSI.
LD template Logical disk template. The template contains a set of logical disk parameters that can be applied
again and again to create logical disks or volumes with the same characteristics using the HP
3PAR Management Console.
Logical Unit
Number See LUN.
LUN Stands for Logical Unit Number. A number used to access a virtual volume that has been assigned
to a particular host on a particular port. See also export, VLUN, and VLUN template.
Magazine
availability Creates a virtual volume that can tolerate a drive magazine failure because its RAID sets use
chunklets from different drive magazines.
matched-set VLUN
template A rule that allows a particular host connected to a particular port to see a virtual volume as a
specified LUN. See also VLUN template.
Maximum
Transmission Unit See MTU.
mirror One member of a group of mirrored chunklets, which is also known as a RAID 1 set.
mirror depth See set size.
mirroring A data redundancy technique used by some RAID levels and in particular RAID 1 to provide data
protection on a storage array.
MTU Maximum Transmission Unit. Maximum Transmission Unit. The greatest amount of data or "packet"
size that can be transferred at one time over a particular network connection without overburdening
the connection.
No One Host
policy Use when exporting a VV to multiple hosts for use by a cluster-aware application, or if using port
presents VLUNs.
No Stale Snapshot System can halt writing data to the base volume so as to prevent loss of sync between the base
volume and its snapshots.
no stale snapshots Virtual copy policy that prevents changes being written to a base volume when it does not have
enough snapshot data or administration space to prevent virtual copies from becoming invalid,
or stale, as a result. See also stale snapshots, virtual copy policy.
One Host policy Constrains the export of a volume to one host or one host cluster (when cluster names may be
used as a host name.) This protects the volume from accidental export to multiple hosts which
could lead to data corruption if both hosts are writing to the volume.
original parent
base volume The original base volume from which a series of virtual and/or physical copies has been created.
Any volume can be the parent from which one or more virtual copies is created, but for each set
of related copies there is only one original parent base volume.
parent volume A virtual volume from which a virtual or physical copy is made. See also original parent base
volume.
parity A data redundancy technique used by some RAID levels and in particular RAID 5 to provide data
protection on a storage array.
parity set See RAID 5 set.
parity set position The group of chunklets that occupy the same position within a RAID 5 logical disk parity set.
physical copy A physical copy is a snapshot that duplicates all the data from one base volume to another base
volume (the destination volume) for use, should the original become unavailable.
physical copy,
promoting Promoting a virtual copy copies the changes from a virtual copy back onto the base volume.
physical parent The source volume for a physical copy.
Port availability Creates a virtual volume that can tolerate two port failures because its RAID sets use chunklets
from devices on different cage loops.
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