HP Hitachi Dynamic Link Manager Software - Manual (Page 642)

C. Glossary
620
A host device name is assigned using the
c
U
t
X
d
Y format.
The variables used in
c
U
t
X
d
Y indicate the following:
U: Controller number reserved by HDLM
X: Target ID or World Wide Name of the sd or ssd device for the HDLM device
Y: LUN of the sd or ssd device for the HDLM device
(See also: host device)
host LU
An LU that a host recognizes.
Each host LU has a host LU number.
(See also: LU, host LU number, host device)
host LU number
A number assigned to a host LU. The host LU number is part of a path name.
(See also: host LU, path name)
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 multiple paths that access an area within an
LU. To distribute the load, load balancing uses multiple paths to perform I/O
operations.
The following six types of algorithms are available:
• The Round Robin algorithm
• The Extended Round Robin algorithm
• The Least I/Os algorithm
• The Extended Least I/Os algorithm
• The Least Blocks algorithm