Hitachi XP P9500 User Manual page 414
Hitachi dynamic link manager software user guide for windows (6.6) (hit5201-96006, november 2011)
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A path name is used to identify a path.
(See also: host LU number)
persistent reservation
Similar to reservations, persistent reservations enable a server to declare that it has
exclusive rights to use an LU, and prevents other servers from accessing that LU. Note,
however, that while reservations allows a server to have exclusive use of only one path
to the LU, persistent reservations allow a server to have exclusive rights to use multiple
paths.
If persistent reservations are used in HDLM, a host can have exclusive use of multiple
paths to an LU, so that load balancing among these paths is possible.
(See also: reservation)
R
Remove LU
A function that allows the user to delete LUs from an HDLM target host. This function is
performed when an LU is deleted, or when all the paths connecting the LU to the host
are placed in the Offline(E) status.
reservation
The reservation function enables a host to declare that it has exclusive rights to use a
particular LU, and prevents other hosts from accessing that LU. Access permission for
an LU that has been reserved is given only to the host that issued the reservation, so
the LU cannot be accessed from multiple paths (coming from multiple hosts)
simultaneously. However, because of this, load balancing is not possible.
(See also: persistent reservation)
S
SAN (Storage Area Network)
A high-speed network connecting hosts to storage systems. This network is independent
of a LAN and is dedicated to data transfers. A SAN provides faster access to storage
systems, and prevents the transfer of high-volumes of data from deteriorating LAN
performance.
SCSI device
A SCSI disk device
SLPR (Storage Logical Partition)
A function supported by Hitachi USP, Universal Storage Platform V/VM, and Virtual
Storage Platform for logically splitting up a storage system. This function splits up the
resources, such as ports, CLPR, and volumes, in the storage system, so that the user
can manage each resource independently.
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