Logical Unit Number (LUN)

The number a host uses to access a logical drive. Each host has its own LUN address space. Therefore, the same LUN may be used by different hosts to access different logical drives. However, a logical drive can only be mapped to a single LUN and a single host group or host.

For example, host 1 may access logical drive Engineering using LUN 5 and host 2 may also use LUN 5 to access logical drive Finance.