HP 3PAR InForm OS 3.1.1 Command Line Interface Reference

This constrains the export of a volume to one host or one host cluster (when cluster names can be
used as a host name).
no_one_host
This policy should only be used when exporting a VV to multiple hosts for use by a cluster-aware
application, or when “port presents” VLUNs are used. This is the default policy setting.
zero_detect
This policy enables the HP 3PAR Storage System to scan for zeros in the incoming write data. This
feature when used during physical copy to a TPVV will avoid allocating space for blocks containing
zero. This feature when used with a Thin Persistence license will reclaim allocated space when
zero blocks are written to the TPVV. This policy is only applicable for the base TPVV.
NOTE: Thin Persistence can have some performance implications during extremely busy system
conditions. 3PAR recommends the zero_detect policy only be enabled during Thin Persistence and
Thin Conversion operations. The zero_detect policy should be disabled during normal operation.
no_zero_detect
This policy disables the HP 3PAR Storage System to scan for zeros in the incoming write data to
reclaim allocated space on the volume. This is the default policy setting.
SPECIFIERS
<usr_CPG>
Specifies the CPG name of the user space of the TPVV. If the CPG name is to be taken from a
template, this field should be (-).
<vvname>[.<index>]
Specifies the VV name up to 31 characters in length. If the -cnt option is used,the optional decimal
number <index> specifies the name of the first VV (<vvname>.<index>). The <index> is
incremented by 1 for each subsequent VV. The <index> must be an integer from 0 to 999999.
All VV names have the same length constraint.
<virtsize>[g|G|t|T]
Size for the VV in MB (maximum of 16T, minimum of 256 MB). The volume size is rounded up to
the next multiple of 32 MB. The size should be an integer. An optional suffix (with no white space
before the suffix) will modify the units to GB (g or G suffix) or TB (t or T suffix). If the size is to be
taken from a template, this field should be (-).
RESTRICTIONS
Use of this command requires a Thin Provisioning license. Contact your local 3PAR representative
for information.
EXAMPLES
The following example displays the creation of a TPVV named tpvv1:
cli% createtpvv -usr_aw 50 -usr_al 75 cpg1 tpvv1 1g
In the preceding example, a 1 GB TPVV named tpvv1 is allocated from a CPG named cpg1 and
its allocation warnings and limits are set at 50% and 75%, respectively.
The following example creates 3 VVs vv1.2, vv1.3, vv1.4:
cli% createtpvv -cnt 3 cpg1 vv1.2 1g
createtpvv 145