HP 3PAR OS 3.1.3 CLI Administrator's Manual

To resynchronize a physical copy, issue the createvvcopy -r <destination_VV> command,
where -r <destination_VV> is the volume to be resynchronized with its parent volume. The
snapshot is retained for quick resynchronization, and the parent-copy relationship is also retained.
Resynchronizing a Group of Physical Copies
Just as groups of physical copies can be created for a list of virtual volumes, those physical copies
can also be resynchronized.
To resynchronize a group of physical copies, issue the creategroupvvcopy -r
<destination_VV> command, where -r <destination_VV> is the volume to be
resynchronized with its parent volume.
Snapshots of the parent volume must have been saved during their creation (using the -s option)
in order to resynchronize the volumes.
Promoting a Physical Copy
Over time, physical copies and their base volumes can change as data is written to each. At some
point the association between the two volumes may no longer be relevant. The association between
a physical copy and a base volume is broken by promoting the physical copy back to the base
volume.
To promote a physical copy back to a base volume, issue the promotevvcopy
<copy_name>|set:<set_name> command, where:
• <copy_name> is the name of the physical copy being promoted.
• <set_name> is the name of the physical copy set being promoted.
Creating an Online Copy
An online copy is a virtual volume copy operation that enables the physical copy or read-write
virtual copy to be instantly available for export to hosts. The destination volume can be immediately
exported and is automatically created by the command.
To create an online copy of a virtual volume, issue the createvvcopy -p <parent_volume>
-online [-snp_cpg <snap_cpg>] [-tpvv] <destination cpg> <destination
volume> command, where:
• -p <parent_volume> creates a snapshot of the parent volume, as identified by
<parent_volume>, and copies the snapshot data to the destination volume.
• -online specifies that the copy is to be performed online. The destination can be immediately
exported and is automatically created.
• [-snp_cpg <snap_cpg>] specifies the snapshot CPG to be associated with the destination
volume.
• [-tpvv] indicates that the destination volume should be a TPVV.
• <destination cpg> specifies the destination CPG to use for the destination volume.
• <destination_volume> is the name of the destination volume. The destination volume
must be equal to or greater in size than the parent volume, must be a writeable volume, and
must not be exported as a VLUN.
NOTE: Using the createvvcopy command with the -online option is incompatible with the
-r, -halt, -s, -b, and -pri options.
For a complete list of options available for the createvvcopy command, see the HP 3PAR
Command Line Interface Reference and the HP 3PAR CLI Help.
Physical Copies 107