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

7.13
Modifying Virtual Volumes
InForm OS Version 2.3.1 3PAR InForm CLI Administrator’s Manual
7.8.2 Creating Thinly-Provisioned Virtual Volumes
A TPVV allocates user space and snapshot space on demand. If you do not specify a CPG to be
used for snapshot space with the
-snp_cpg option, the TPVV will have no snapshot space.
 To create a TPVV, issue the createvv -tpvv -snp_cpg <CPG_name> -usr_aw
<percent> -usr_al <percent> <user_CPG> <VV_name> <VV_size
g|G|t|T>
command, where:
◆ -tpvv indicates that you are creating a Thinly-Provisioned Virtual Volume.
◆ <CPG_name> is the name of the CPG from which the volume will draw its snapshot
space and administration space.
◆ -usr_aw <percent> is the allocation warning alert limit for the user space specified
in percentage. This generates an alert when the user space of the volume exceeds a
specified percentage of the volume’s size.
◆ -usr_al <percent> is the allocation limit of the user space specified in percentage.
This prevents the user space from exceeding a specified percentage of the volume’s size.
◆ <user_CPG> is the name of the CPG from which the created virtual volume will draw
its user space.
◆ <VV_name> is the name of the volume being created. The name can be up to 31
characters.
◆ <VV_size g|G|t|T> is the size of the volume in MB, GB, or TB. If g|G|t|T is not
specified,
VV_size is the number of MBs. For example, 50g specifies 50 GBs.
For a complete list of options available for the
createvv command, see the InForm OS
Command Line Interface Reference and InForm CLI Help.
7.9 Modifying Virtual Volumes
Existing virtual volumes can be modified to use a new name, draw space from a different CPG,
set allocation warnings, or to use new policies.
 To modify a volume to draw its snapshot space and administration space from a different
CPG, issue the
setvv -snp_cpg <CPG_name> -usr_cpg <user_cpg> <VV_name>
command, where:
◆ <CPG_name> is the name of the CPG from which the modified volume will draw its
snapshot space and administration space.