HP StorageWorks XP24000 Configuration Manual page 52

host mode Each port can be configured for a particular host type. These modes are
represented as two-digit hexadecimal numbers. For example, host mode 08
represents an HP-UX host.
LDEV Logical device. An LDEV is created when a RAID group is carved into pieces
according to the selected host emulation mode (that is, OPEN-3, OPEN-8,
OPEN-L). The number of resulting LDEVs depends on the selected emulation
mode. The term LDEV is often used synonymously with the term volume.
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 A LUN is normally associated with only a single LDEV. The LUSE feature allows
a LUN to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible
for applications to access a single large pool of storage. The LUSE feature is
available when the HP StorageWorks XP Array Manager product is installed.
OFC Open Fibre Control.
OPEN- x
A general term describing any one of the supported OPEN emulation modes (for
example, OPEN-L).
PA Physical address.
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 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.
RAID Redundant array of independent disks.
R-SIM Remote service information message.
SCSI Small computer system interface.
SIM
Service information message.
SNMP
Simple Network Management Protocol.
SVP Service processor, which is the PC built into the disk controller. The SVP provides
a direct interface into the disk array. SVP use is reserved for HP support
representatives only.
SVS
Storage Virtualization System, an appliance that manages multiple disk array
storage systems.
TID
Target ID.
Volume On the XP array, a volume is a uniquely identified virtual storage device
composed of a control unit (CU) component and a logical device (LDEV)
52 Glossary