HP XP7 Storage - Manual (Page 432)

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
A logical division of an LU that HDLM controls and operates. A Dev is equivalent to a
partition in Windows.
In Windows, 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)
dynamic reconfiguration
Dynamic reconfiguration enables HDLM to recognize devices whose configuration has
been changed without restarting the host. The plug-and-play operation of Windows
enables this functionality.
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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Glossary-2
Hitachi Dynamic Link Manager (for Windows®) User Guide