86 HP StorageWorks XP12000 Disk Array Owner’s Guide
OFC Open Fibre Control.
OLM Optical link module.
OS Operating system.
PA Physical address.
parity group A parity group is a mode of disk operation and configuration in which
multiple disks work together to provide redundancy. Synonymous with
“array group.”
partition Dividing a specific physical disk into two or more areas as if there are two
or more physical disks.
path Paths are created by associating a port, a target, and a LUN ID with one or
more LDEVs.
PCI Power control interface or peripheral component interconnect.
port A physical connection that allows data to pass between a host and the disk
array. The number of ports on an XP disk array depends on the number of
supported I/O slots and the number of ports available per I/O adapter. The
XP family of disk arrays supports Fibre Channel (FC) ports as well as other
port types. Ports are named by port group and port letter, such as CL1-A.
CL1 is the group, and A is the port letter.
P-P Point-to-point.
primary rack The XP10000 rack that contains the basic disk array components, including
the controller and one disk chassis. The primary rack can contain a second
optional disk chassis.
PS Power supply.
RS Russellstoll
®
, a brand of electrical plugs and receptacles manufactured by
Thomas & Betts Corporation.
RAID Redundant array of independent disks.
RAID group See “array group.”
RAID level A RAID Level is one of the ways that disk drives are grouped together to
improve performance, data availability/reliability or both. RAID levels are
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