HP 3PAR InForm OS 3.1.1 Concepts Guide

controller node An individual device that works with other controller nodes to cache and manage data in a system
and to provide hosts with a coherent, virtualized view of the storage system.
controller node
chassis
An enclosure that houses all the controller nodes of a system.
copy data Data that occupies the snapshot data space (virtual copy space) on a virtual volume.
copy size The amount of snapshot data space (the logical disk space reserved for snapshots) in a virtual
volume.
copy-on-write
snapshot
A snapshot of a virtual volume made with the copy-on-write technique. This type of snapshot
consists of a pointer to the source volume and a record of every change made to the source
volume since the snapshot was created.
CPG Common Provisioning Group (also known as a storage pool or logical disk pool). A set of logical
disks from which you can create virtual volumes and virtual copies that are capable of allocating
storage on demand.
CPG template Common Provisioning Group template. A CPG template contains a set of common provisioning
group and logical disk parameters that HP 3PAR Management Console users can apply in order
to create a new Common Provisioning Group.
created host A host that is defined on the system but does not necessarily have any physically connected host
paths or WWNs assigned to it.
Customer
Controlled Access
A software tool that restricts connections between the service processor and the HP 3PAR technical
support center. Customer Controlled Access is independent of the user's network firewall and
works whether the connections are made through the Internet or through a point-to-point modem
connection.
daisy chaining Cabling configuration where components such as BBUs or drive cages are connected in succession.
data cache The dual in-line memory modules (DIMMs) that support the HP 3PAR ASIC located in a controller
node.
data cache DIMM A single data cache memory module.
data cache riser
card
A printed circuit board with DIMM sockets that hold data cache memory modules.
destination volume The virtual volume to which data is copied during a virtual or physical copy operation.
disk scrub System functionality that scans physical disks for defects by reading and writing to the system's
IDE disk.
drive bay The space in a drive chassis into which a drive magazine is inserted.
drive chassis An enclosure that houses drive cages.
drive chassis
cabinet
In a multicabinet system, any cabinet that is connected to a node cabinet but does not contain
controller nodes.
drive chassis
housing
The enclosure that houses the components of a drive chassis.
drive magazine An electronic circuit board mounted on a mechanical structure that is inserted into a drive bay
in a drive cage. A drive magazine holds up to four physical disks.
drive magazine
filler panel
The panel used to seal off an empty drive bay. All drive bays in a drive cage must be sealed for
EMI and airflow considerations.
drive mount A metal bracket used to secure a physical disk to a drive magazine. Each disk must be secured
by two drive mounts.
ESI Enclosure Services Interface. Interface on the DC2 and DC4 drive cages through which the node
software communicates to the cage enclosure services controller to obtain enclosure and cage
status and control the cage behaviors.
event A detectable system occurrence.
export To present a virtual volume to a host. Exporting makes a volume available to a host by creating
an association between the volume's name and a LUN (logical unit number) for the specified host
and port.
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