3PAR InForm® OS 2.3.1 CLI Administrator's Manual (320-200180 Rev B, February 2010)

7.3
Overview
InForm OS Version 2.3.1 3PAR InForm CLI Administrator’s Manual
7.1 Overview
A Common Provisioning Group (CPG) creates a virtual pool of logical disks that allows up to
4,095 virtual volumes to share the CPG's resources and allocate space on demand. Virtual
volumes draw their resources from CPGs, and virtual volumes are exported as Logical Unit
Numbers (LUNs) to hosts. Virtual volumes are the only data layer visible to hosts. You can
create physical copies or virtual copy snapshots of virtual volumes for use if the original base
volume becomes unavailable. Before creating virtual volumes, you must first create CPGs to
allocate space to the virtual volumes.
For detailed information about CPGs and virtual volumes, see the 3PAR InForm OS Concepts
Guide.
For instructions on how to create copies of volumes, see Chapter 8, Managing Virtual Volume
Copies.
NOTE: Creating Thinly-Provisioned Virtual Volumes (TPVVs) requires the 3PAR
Thin Provisioning license. Creating virtual copies or snapshots requires the 3PAR
Virtual Copy license. Contact your 3PAR representative for more information.