Hitachi Copy-on Write SnapShot, User Manual

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Glossary–8
Hitachi Simple Modular Storage Copy-on-Write SnapShot User’s Guide
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
iSCSI
Internet-Small Computer Systems Interface, a TCP/IP protocol for
carrying SCSI commands over IP networks.
iSNS
Internet-Small Computer Systems Interface, a TCP/IP protocol for
carrying SCSI commands over IP networks.
L
LAN
Local Area Network, a computer network that spans a relatively small
area, such as a single building or group of buildings.
load
In UNIX computing, the system load is a measure of the amount of
work that a computer system is doing.
logical
Describes a user's view of the way data or systems are organized. The
opposite of logical is physical, which refers to the real organization of a
system. A logical description of a file is that it is a quantity of data
collected together in one place. The file appears this way to users.
Physically, the elements of the file could live in segments across a disk.
logical unit
See logical unit number.
logical unit number (LUN)
An address for an individual disk drive, and by extension, the disk
device itself. Used in the SCSI protocol as a way to differentiate
individual disk drives within a common SCSI target device, like a disk
array. LUNs are normally not entire disk drives but virtual partitions (or
volumes) of a RAID set.
LU
Logical unit.
LUN
See logical unit number.
LUN Manager
This storage feature is operated through Storage Navigator Modular 2
software and manages access paths among host and logical units for
each port in your array.