Encyclopedia of Database Systems

2009 Edition

Logical Unit Number

  • Kaladhar Voruganti
Reference work entry
DOI: https://doi.org/10.1007/978-0-387-39940-9_527


 LUN;  Volume


LUN is a SCSI protocol term that refers to a logically contiguous piece of storage. This usually corresponds to a volume in a storage array or an individual disk drive on a parallel SCSI bus. The storage volume identifier gets mapped to a LUN by the host operating system and they are usually different.

Key Points

A volume on a storage controller can be assigned different LUN numbers on different hosts. A volume on a storage controller can be partitioned into multiple volumes, and thus, LUNs by storage virtualization software. The storage virtualization software can reside on hosts or network virtualization boxes.


Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Kaladhar Voruganti
    • 1
  1. 1.Network ApplianceSunnyvaleCAUSA