HP Hitachi Dynamic Link Manager Software - Manual (Page 230)

CLPR(Cache Logical Partition)
A function supported by the Universal Storage Platform V/VM series, Virtual Storage
Platform series, Hitachi AMS2000/AMS/WMS/SMS series, HUS100 series, and HUS VM
for logically splitting up a cache. This function can split up a cache into parity groups in
the storage system, so that other parity groups do not affect the cache performance.
D
Dev (Device)
A target that HDLM controls and operates. A Dev is called a device in VMware vSphere.
In VMware vSphere, each LU has only one Dev.
Each Dev has a Dev number.
(See also: Dev number)
Dev number
A Dev number (the DNum column) in the configuration list in HDLM.
0 is displayed as the number indicating the entire LU.
HDLM operates assuming that one LU has one Dev, so the Dev number is always fixed
to 0.
(See also: Dev)
E
emulation type
An LU type that is accessible from a host. Since an HDLM host is an open-system host
such as a PC or a UNIX computer, the HDLM 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.
failover
A function for switching to another normal path if there is an error in the current access
path, thereby enabling the system to continue to operate.
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Hitachi Dynamic Link Manager User Guide for VMware ®