3PAR InForm® OS 2.2.4 Concepts Guide (320-200085 Rev B, March 2009)

InForm OS Version 2.2.4 3PAR InForm OS Concepts Guide

9.1

Virtual Volumes Exports

In this chapter

9.1 Active and Template VLUNs 9.1

9.2 VLUN Template Types 9.2

9.2.1 Host Sees 9.2

9.2.2 Port Presents 9.2

9.2.3 Matched Set 9.3

9.1 Active and Template VLUNs

A virtual-LUN, or VLUN, is a pairing between a virtual volume and a logical unit number (LUN),

expressed as either a VLUN template or an active VLUN.

A VLUN template sets up an association between a virtual volume and a LUN-host, LUN-port,

or LUN-host-port combination by establishing the export rule, or the manner in which the

volume is exported.

When you create a VLUN template, if the current system state meets the conditions established

by the template, active VLUNs--exports that are seen as LUNs by the host--are the result.

Depending on the conditions of the VLUN template, a single template can produce more than

one active VLUN.