Logical Device File; Lu (Logical Unit) - Hitachi XP P9500 User Manual

logical device file

A device file in the /dev directory.
Note that the term logical device here is different from LDEV.

LU (Logical Unit)

A logical unit that is a logical volume defined in the storage system, and with which the
host can perform input or output operations.
(See also: host LU)
N
node
A server in a cluster.
non-owner controller
A controller other than an owner controller.
Non-owner controllers exist only in the Thunder 9500V series, or Hitachi AMS/WMS
series.
(See also: owner controller, non-owner path)
non-owner path
A path that passes through a non-owner controller.
Non-owner paths exist only in the Thunder 9500V series, or Hitachi AMS/WMS series.
(See also: owner path, non-owner controller)
O
owner controller
A controller that has been set as an owner controller for an LU. Owner controllers are
only in the Thunder 9500V series, or Hitachi AMS/WMS series. A controller other than
an owner controller is called a non-owner controller.
When using Lightning 9900 series, Lightning 9900V series, Hitachi USP, Universal
Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000 series, or Hitachi
SMS, all controllers are owner controllers.
(See also: owner path, non-owner controller)
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, 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)
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