Hitachi XP P9500 User Manual page 736

D. Glossary
owner controller is called a non-owner path.
When using the Lightning 9900 series, Lightning 9900V series, Hitachi USP,
Universal Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000 series,
or Hitachi SMS, all paths are owner paths.
(See also: owner controller, non-owner path)
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
(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
changes the status of the path to the
Path health checking checks only those paths that have the
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)
712
P
AutoPATH_ID
status, path health checking
Online
status.
Offline(E)
Online
.
status.