What Does Logical Unit Number (LUN) Mean?
A logical unit number (LUN) is a number used for identifying a logical unit relating to computer storage. A logical unit is a device addressed by protocols and related to fiber channel, small computer system interface (SCSI), Internet SCSI (iSCSI) and other comparable interfaces.
Techopedia Explains Logical Unit Number (LUN)
A standard disc array has several SCSI ports. Each SCSI port has an assigned target address. The disc array is formatted as RAID and partitioned into various storage units. Each volume is configured with a logical unit. There can be numerous logical units characterizing several volumes. Likewise, a disc drive with a single SCSI port typically has one target with a singular logical unit with a zero LUN. The zero signifies the entire storage of the disc drive.
