beautypg.com

HP Hitachi Dynamic Link Manager Software User Manual

Page 643

background image

C. Glossary

621

The Extended Least Blocks algorithm

local boot disk environment

An environment in which a boot disk is located on the host.

logical device file

Device files under

/dev/dsk

and

/dev/rdsk

.

Note that the term logical device used here is not an 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 is in use. A controller

other than an owner controller is called a non-owner controller.
When the Lightning 9900 Series, Lightning 9900V Series, Hitachi USP, Universal

Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000 Series or

Hitachi SMS is in use, all controllers are owner controllers.