HP 3PAR Command Line Interface Administrator's Manual: HP 3PAR OS 3.1.2 (QR482-96525, September 2013)

Similarly, if a fully-provisioned virtual volume’s storage space is largely unused, you can convert
it to a TPVV in order to save storage space.
Converting remote copy virtual volumes and virtual volumes that contain snapshots is not supported.
You can, however, convert virtual volumes with snapshots and use the -keepvv option to create
a new virtual volume with a new WWN that contains the original LDs and snapshots, in order to
retain those snapshots. Snapshots cannot be exported in order for the -keepvv option to work.
If the snapshots are exported, an error is returned.
Converting volumes from thin to full requires the HP 3PAR Dynamic Optimization license.
Converting volumes from full to thin requires the HP 3PAR Dynamic Optimization Software license
and HP 3PAR Thin Provisioning Software license.
Converting Fully Provisioned Virtual Volumes to Thinly Provisioned Virtual Volumes
To convert an FPVV to a TPVV, issue the tunevv usr_cpg <cpg> -tpvv <VV_name>, where:
• usr_cpg <cpg> is the name of the CPG from which the converted virtual volume will draw
its user space.
• -tpvv indicates that you are converting the existing FPVV to a TPVV.
• <VV_name> is the name of the virtual volume being converted.
Converting Thinly Provisioned Virtual Volumes to Fully Provisioned Virtual Volumes
To convert a TPVV to an FPVV, issue the tunevv usr_cpg <cpg> -full <VV_name>, where:
• usr_cpg <cpg> is the name of the CPG from which the converted virtual volume will draw
its user space.
• -full indicates that you are converting the existing TPVV to an FPVV.
• <VV_name> is the name of the virtual volume being converted.
For a complete list of options available for the tunevv command, see the HP 3PAR Command
Line Interface Reference and the HP 3PAR CLI Help.
Reducing Volume Size with HP 3PAR Thin Conversion Software
HP 3PAR Thin Conversion Software is an optional feature that converts a traditional volume to a
TPVV. Virtual volumes with large amounts of allocated but unused space are converted to TPVVs
that are much smaller than the original volume. Volumes are converted by creating a physical copy
of the volume. During the conversion process, allocated but unused space is discarded and the
result is a TPVV that uses less space than the original volume. To convert volumes located on a
system, you must have an F-Class, T-Class, HP 3PAR StoreServ 10000 Storage, or HP 3PAR
StoreServ 7000 Storage system to perform the copy operation.
The conversion process has four steps:
1. Assessment.
2. Data preparation.
3. Zeroing unused space.
4. Creating a physical copy.
NOTE: Converting fully provisioned volumes to TPVVs with the Thin Conversion feature requires
an F-Class, T-Class, StoreServ 10000, or StoreServ 7000 Storage system, an HP 3PAR Thin
Provisioning Software license, and an HP 3PAR Thin Conversion Software license. Contact your
HP representative for more information.
Reducing Volume Size with HP 3PAR Thin Conversion Software 85