3PAR InForm® OS 2.2.4 Concepts Guide (320-200085 Rev B, March 2009)

GL 10
Glossary
InForm OS Version 2.2.4 3PAR InForm OS Concepts Guide
privilege levels
Four user privilege levels (Super, Edit, Service,
and Browse) allow varying degrees of access to
storage system administrative functions.
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.
R
rack
The EIA-standard rack within a cabinet that
holds the components of a storage server.
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
Stands for 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 set
A grouping of mirrored or parity-protected
chunklets.
RAID type
RAID 0, RAID 10 (1), RAID 50 (5) 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
3PAR Remote Copy with two storage servers that
are connected via Fibre Channel ports. See also
3PAR Remote Copy.
RCIP
Remote Copy over IP. The use of 3PAR Remote
Copy with two storage servers that are
connected via Ethernet ports. See also 3PAR
Remote Copy.
region
A subdivision of a logical disk or virtual volume.
The size of a region is always a multiple of 32
MB.
registered state change notification (RSCN)
A Fibre Channel switch function that allows
notification to registered nodes if a change
occurs to other specified nodes.
registration
See SCSI reservation/registration.
reservation
See SCSI reservation/registration.