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72 HP StorageWorks Disk Array XP Operating System Configuration Guide: HP-UX
FC-AL Fibre Channel arbitrated loop.
FCP Fibre Channel Protocol.
HBA Host bus adapter.
HP Hewlett-Packard Company.
LDEV Logical device. An LDEV is created when a RAID group is divided into
sections using a selected host emulation mode (for example, OPEN-9 or
OPEN-M). The number of resulting LDEVs depends on the emulation mode.
“LDEV” and “volume” are synonyms.
LUN Logical unit number. A LUN results from mapping a SCSI logical unit
number, port ID, and LDEV ID to a RAID group. The size of the LUN is
determined by the emulation mode of the LDEV and the number of LDEVs
associated with the LUN. For example, a LUN associated with two OPEN-
3 LDEVs has a size of 4,693 MB.
LUSE Logical Unit Size Expansion, a feature which logically combines LDEVs
so they appear as a larger LDEV. This allows a LUN to be associated with
2 to 36 LDEVs. LUSE allows applications to access data requiring large
amounts of disk space.
OFC Open Fibre Control.
OPEN-x A general term describing any one of the supported OPEN emulation
modes (for example, OPEN-L).
OS Operating system.
path “Path” and “LUN” are synonymous. Paths are created by associating a port,
a target, and a LUN ID with one or more LDEVs.
port A connector on a channel adapter card in the disk array. A port passes data
between the disk array and external devices, such as a host server. Ports are
named using a port group and port letter, for example, CL1-A.
RAID Redundant array of independent disks.