HP 3PAR InForm OS 3.1.1 Concepts Guide

primary and secondary paths are not user configurable and are determined by drive magazine
placement.
promote For physical copies: to break the association between a physical copy and a base volume by
changing the physical copy into an independent base volume. For virtual copies: to copy the
changes from a virtual copy back onto the base volume, therefore overwriting the base volume
with the virtual copy.
rack The EIA-standard rack within a cabinet that holds the components of a system.
rack filler panel A panel used to seal off an empty 1U, 2U, or 4U space on the rack. All empty spaces in the rack
must be sealed for EMI and airflow considerations.
rack unit (U) The standard unit of height for an EIA-standard rack or components housed in an EIA-standard
rack: equivalent to 1.75 in. (4.45 cm).
RAID Redundant array of independent disks.
RAID 0 set Striped rows of chunklets on two or more physical disks. A RAID 0 set offers no data redundancy.
RAID 10 (RAID 1)
set
A group of mirrored chunklets.
RAID 50 (RAID 5)
set
A group of parity-protected chunklets. Also known as a parity set.
RAID MP RAID Multi-Parity. A group of double-parity chunklets.
RAID set A grouping of mirrored or parity-protected chunklets.
RAID type RAID 0, RAID 10 (1), RAID 50 (5), and RAID MP (6) are all supported RAID types; however, not
all RAID types may be available on your system.
RCFC Remote Copy over Fibre Channel. The use of Remote Copy with two systems that are connected
via Fibre Channel ports.
RCIP Remote Copy over IP. The use of Remote Copy with two systems that are connected via Ethernet
ports.
region A subdivision of a logical disk or virtual volume. The size of a region is always a multiple of 32
MB.
resynchronize To copy changes from one volume in a physical copy pair to the other volume because the original
volume was modified at some point after the physical copy operation took place.
roles and rights The roles and rights assigned to a user determine which tasks the user can perform with a system.
row A grouping of RAID sets. Data is striped across the rows of RAID 10 and RAID 50 logical disks.
row size The number of sets in a row. A row is a grouping of RAID sets. Data is striped across the rows
of RAID 10 and RAID 50 logical disks.
RSCN Registered State Change Notification. A Fibre Channel switch function that allows notification to
registered nodes if a change occurs to other specified nodes.
safety breaker The device used to power on and power off the power distribution unit. The safety breaker also
prevents power surges in the AC line from damaging a system.
second virtual
volume backup
node
The controller node that takes over for the virtual volume backup node if the virtual volume node
fails.
secondary path Connection between a controller node initiator port and a physical disk that is used when the
primary path is inaccessible (a failure condition). The primary and secondary paths are not user
-configurable; they are determined by drive magazine placement.
Service Processor A device inserted into a rack or virtual software that enables you to locally and remotely monitor
and service systems.
set size The number of chunklets in a set. Also known as mirror depth for RAID 1 sets and parity set for
RAID 5 sets.
severity indicator Icon in the HP 3PAR Management Console alert pane or on the HP 3PAR Management Console
status bar that shows the seriousness of an alert.
SFP Small form-factor pluggable transceiver.
78 Glossary