HP XP P9500 Hitachi Dynamic Link Manager Software User Guide for VMWare (HIT52 - Page 181

path health checking, path name, remote management client, reservation, SAN Storage Area Network

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P path An access path from a host to a storage system. Access to an area within an LU in a storage system is made via a cable connecting the HBA on the host and the CHA on the storage system. This cable is a path. Each path has an AutoPATH_ID. (See also: AutoPATH_ID) path health checking A function for checking the status of paths at regular intervals. When an error occurs on a path that was in the Online status, path health checking changes the status of the path to the Offline(E) status. Path health checking checks only those paths that have the Online status. path name The path name consisting of the following four elements, separated by periods: - Host port number (hexadecimal number) - Bus number (hexadecimal number) - Target ID (hexadecimal number) - Host LU number (hexadecimal number) A path name is used to identify a path. (See also: host LU number) R remote management client A machine that connects to a host via a LAN, and uses commands and utilities to control it. 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. # ABCD E F GH I J K LMNOPQR S T U VWX Y Z Hitachi Dynamic Link Manager User Guide (for VMware(R)) Glossary-5

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P
path
An access path from a host to a storage system. Access to an area within an LU in a
storage system is made via a cable connecting the HBA on the host and the CHA on the
storage system. This cable is a path. Each path has an
AutoPATH_ID
.
(See also:
AutoPATH_ID
)
path health checking
A function for checking the status of paths at regular intervals.
When an error occurs on a path that was in the
Online
status, path health checking
changes the status of the path to the
Offline(E)
status.
Path health checking checks only those paths that have the
Online
status.
path name
The path name consisting of the following four elements, separated by periods:
- Host port number (hexadecimal number)
- Bus number (hexadecimal number)
- Target ID (hexadecimal number)
- Host LU number (hexadecimal number)
A path name is used to identify a path.
(See also:
host LU number
)
R
remote management client
A machine that connects to a host via a LAN, and uses commands and utilities to control
it.
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.
#
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Glossary-5
Hitachi Dynamic Link Manager User Guide (for VMware(R))