HP XP Racks - Manual (Page 490)

CLPR(Cache Logical Partition)
A function supported by the Hitachi USP series, Universal Storage Platform V/VM series,
Virtual Storage Platform series, VSP G1000 series, Hitachi AMS2000/AMS/WMS/SMS
series, HUS100 series, and HUS VM for logically splitting up a cache. This function can
splits up a cache into parity groups in the storage system, so that other parity groups
do not affect the cache performance.
cluster
A system of connecting multiple hosts with the same OS or platform (essentially, an
environment in which the same application can run) and treating them as one system.
D
Dev (Device)
A logical division of an LU that HDLM controls and operates. A Dev is equivalent to a
logical volume in AIX.
In an AIX environment, each LU has only one Dev.
Each Dev has a Dev number.
Depending on the access method, Devs are classified into two types: block devices and
character devices.
(See also: Dev number)
Dev number
A number that is assigned to a device within an LU. The device numbers are assigned
sequentially from 0. A Dev number is called a logical volume number in AIX.
HDLM operates assuming that one LU has one Dev, so the device number is fixed to 0.
(See also: Dev)
E
emulation type
An LU type that is accessible from a host. Since an HDLM management-target host is an
open-system host such as a PC or a UNIX computer, the HDLM management-target
host can access only the LUs that have open-system emulation types.
For details on emulation types supported by a storage system, see the maintenance
manual for that particular storage system.
F
failback
A function for placing the status of a path recovered from an error into the Online
status, and then switching the access path to the path that was just recovered.
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Glossary-2
Hitachi Dynamic Link Manager (for AIX) User Guide