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LUN

Stands for "Logical Unit Number." LUNs are used to identify SCSI devices, such as external hard drives, connected to a computer. Each device is assigned a LUN, from 0 to 7, which serves as the device's unique address.

LUNs can also be used for identifying virtual hard disk partitions, which are used in RAID configurations. For example, a single hard drive may be partitioned into multiple volumes. Each volume can then be assigned a unique LUN. However, few modern computers use LUNs, since SCSI devices have mostly been replaced by USB and Firewire devices.

Updated in 2006 by Per C.

quizTest Your Knowledge

What is the purpose of an archive bit?

A
It indicates if a file is compressed or not.
0%
B
It prevents a file from being compressed.
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C
It indicates if a file has been backed up or not.
0%
D
It labels a file as saved or unsaved.
0%
Correct! Incorrect!     View the Archive Bit definition.
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