HP 3PAR StoreServ Storage Concepts Guide (OS 3.1.2 MU2) (QR482-96384, June 2013)
physical disk A dual-ported Fibre Channel disk mounted onto a drive magazine.
physical parent The source volume for a physical copy.
physical size The total actual raw storage allocated to a logical disk, as determined by its size and RAID type.
port-presents
VLUN template
A VLUN template that allows any host connected to a particular port to see a virtual volume as
a specified LUN.
power bank A group of four connected AC outlets within the power distribution unit (PDU). There are two
power banks in each PDU.
power supply A device that converts current from an AC line into appropriate DC levels and provides that
power to a system component.
preserved data Data that is suspended in the system’s cache memory due to backend failure.
preserved data
logical disks
RAID 10 logical disks created by the system during initial system setup to store preserved data.
The logical capacity of the preserved data logical disks is equal to the sum of all data cache
memory of the system.
primary path Connection between a controller node initiator port and a physical disk that is used by default.
When the primary path cannot be used (a failure condition), the secondary path is used. The
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.
90 Glossary