Hitachi XP P9500 User Manual page 438

I
intermittent error
An error that occurs irregularly due to, for example, a loose cable connection.
L
LDEV (Logical Device)
A combination of the storage system's product name, serial number, and an internal LU.
HDLM uses this value to identify a particular LU.
load balancing
A function for distributing the load across all the paths that are accessing the logical
areas within an LU. To distribute the load, load balancing uses multiple paths to perform
I/O operations.
HDLM uses the following six algorithms for load balancing:
- The Round Robin algorithm
- The Extended Round Robin algorithm
- The Least I/Os algorithm
- The Extended Least I/Os algorithm
- The Least Blocks algorithm
- The Extended Least Blocks algorithm
logical device file
/dev/hdiskn, and /dev/rhdiskn. A logical device of this term is not an LDEV. The
logical device file name can be changed by using the rendev command.
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 when the Thunder 9500V series, or Hitachi AMS/
WMS series.
(See also: owner controller, non-owner path)
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Hitachi Dynamic Link Manager User Guide (for AIX(R))
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