HP Hitachi Dynamic Link Manager Software - Manual (Page 700)

owner path
A path that passes through an owner controller for an LU in the Thunder 9500V series,
or Hitachi AMS/WMS series. A path that passes through a controller other than an
owner controller is called a non-owner path.
When using the Lightning 9900 series, Lightning 9900V series, Hitachi USP series,
Universal Storage Platform V/VM series, Virtual Storage Platform series, Hitachi
AMS2000 series
# , Hitachi SMS series # , HUS100 series # , or HUS VM, all paths are owner
paths.
(See also: owner controller, non-owner path)
#: This storage system applies when the dynamic I/O path control function is disabled.
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 physical 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)
physical path
An access path from a host to an LU. A path name is used to identify a physical path.
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Glossary-6
Hitachi Dynamic Link Manager User Guide for Linux ®