HP 3PAR OS 3.1.3 Command Line Interface Reference

specified in days or hours providing either d or D for day and h or H for hours following the entered
time value.
NOTE: The -retain option requires the HP 3PAR Virtual Lock license. Contact your local service
provider for more information.
NOTE: If the volume is not in any domain, then its retention time cannot exceed the value of the
system's maximum VV retention time. The default value for the system's maximum VV retention time
is 14 days. If the volume belongs to a domain, then its retention time cannot exceed the value of
the domain's maximum VV retention time, if set. The retention time cannot be removed or reduced
once it is set. If the volume has its retention time set, it cannot be removed within its retention time.
If both expiration time and retention time are specified, then the retention time cannot be longer
than the expiration time.
–pol <policy>[,<pol>...]
Specifies virtual volume policies:
• stale_ss - Specifies that invalid (stale) snapshot volumes are permitted. Failures to update
snapshot data occur when there is not sufficient administration or snapshot space. Failures to
update snapshot data does not affect the write to the base volume. However, the snapshot is
considered invalid. This the default policy setting.
• no_stale_ss - Specifies that stale snapshot volumes are not permitted. A failure to update
a snapshot is considered a failure to write to the base volume. Existing stale snapshots remain
stale.
• one_host - Constrains the export of a volume to one host or one host cluster (when cluster
names may be used as a host name).
• no_one_host - This policy should only be used when exporting a virtual volume 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 - Enables the HP 3PAR storage system to scan for zeros in the incoming write
data. When used during a physical copy to a Thinly Provisioned Virtual Volume (TPVV) avoids
allocating space for blocks containing zero. When used with a Thin Persistence license,
reclaims allocated space when zero blocks are written to a TPVV. This policy is applicable
for base TPVVs.
NOTE: There can be some performance implication under extreme busy systems so it is
recommended for this policy to be turned on only during Fat to Thin and re-thinning process
and be turned off during normal operation.
• no_zero_detect - Disables the HP 3PAR storage system to scan for zeros in the incoming
write data to reclaim allocated space on the volume.
-snp_cpg <snp_cpg>
Specifies that the volume snapshot space is to be provisioned from the specified CPG. This option
moves all the logical disks currently contained in the snapshot space for these volumes into the
CPG. This is permitted only when none of the logical disks are shared with other volumes that are
not specified in this option. If the <snp_CPG> specifier is specified as "", the volume snapshot
space is longer provisioned from a CPG and the existing snapshot space logical disks are removed
from the CPG. This is permitted only when the existing snapshot logical disks are exclusively used
by the volumes specified in this option.
NOTE: The operation of setting a snapshot space CPG for a tpsd volume (a TPVV created with
HP 3PAR OS 2.2.4 or earlier) is not permitted if the volume has existing snapshots. All existing
snapshots must first be removed before using this option.
-snp_aw <percent>
334 Set Commands