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

8.4
Virtual Volume Exports (VLUNs)
3PAR InForm OS Concepts Guide InForm OS Version 2.2.4
8.6 Virtual Volume Exports (VLUNs)
To export a virtual volume is to make it available to one or more hosts by creating an
association between a volume and a LUN. This is accomplished by creating virtual-LUNs, or
VLUNs.
Use the InForm CLI or the InForm Management Console to create VLUN templates. When you
create a VLUN template, if the current system state meets the conditions established by the
VLUN template, that template is immediately applied to create one or more active VLUNs.
These active VLUNs enable virtual volumes to be exported to hosts. If the current system state
does not meet the conditions of the VLUN template, no active VLUNs are created until the
conditions of the template are met.
To learn more about VLUNs, see Chapter 9, Virtual Volumes Exports. For instructions on
creating VLUN templates that enable volumes to be exported, see the InForm OS CLI
Administrator’s Manual or the InForm OS Management Console Online Help.
NOTE: The system may round up when creating logical disks to support virtual
volumes and Common Provisioning Groups (CPGs), resulting in a discrepancy
between the user-specified size or growth increment and the actual space
allocated to logical disks created by the system. For a detailed discussion of this
issue, see Logical Disk Size and RAID Type on page 7.3.
NOTE: For additional information on logical disks, see 3PAR Storage Concepts and
Terminology on page 2.2.