HP XP RAID Manager Software User Manual
Page 409
Glossary
409
HORCM_MON
A section of the RM instance configuration file that defines the instance
you are configuring.
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.
hot standby
Using one or more servers as a standby in case of a primary server failure.
HP
Hewlett-Packard Company.
instance
An independent copy of RM. Instances are local or remote and can run on
the same host.
instance
configuration file
A file that defines the link between a volume and an RM instance. This file
consists of four sections: HORCM_MON, HORCM_CMD,
HORCM_DEV
and HORCM_INST.
LCP
Local control port.
LDEV
Logical device. An LDEV is created when a RAID group is divided into
sections using a host emulation mode (for example, OPEN-9 or OPEN-M).
The number of resulting LDEVs depends on the emulation mode. The term
LDEV is often used synonymously with the term volume.
local disk
A disk in the local array. Sometimes refers to a disk in a local host.
local instance
The RM instance currently being configured or the instance to which
commands are issued.
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. Essentially, LUSE makes it possible for applications to
access data requiring a large amount of disk space.
MB
Megabyte.
MCU
Main control unit.