HP 3PAR InForm OS 3.1.1 CLI Administrator's Manual

system configuration, go to the Single Point of Connectivity Knowledge (SPOCK) website
http://spock.corp.hp.com/index.aspx.
• To create a virtual copy, or snapshot, of a virtual volume or a virtual volume set, issue the
createsv -ro <snapshot_name> <source_VV>|set:<set_name> command, where:
◦ -ro specifies that the snapshot being created is read-only.
◦ <snapshot_name> is the name of the snapshot being created.
◦ <source_VV> is the name of the virtual volume being copied.
◦ <set_name> is the name of the virtual volume set being copied.
For a complete list of options available for the createsv command, see the HP 3PAR InForm
OS Command Line Interface Reference and InForm OS Command Line Interface Help.
Promoting a Virtual Copy
If you have created multiple copies of a base volume, the data on a virtual copy can be rolled
back to the base volume or to any of the virtual copy’s RW parents in the same tree by promoting
a virtual copy. This copies the changes from the virtual copy back onto the base volume, overwriting
the base volume with the copy. The virtual copy still remains on the system.
• The virtual copy and the target of the promote must not be exported.
• Only one promote operation is allowed at a time within a virtual volume family tree.
• To promote a virtual copy back to a base volume or back to any of the virtual copy’s RW
parents in the same virtual volume family tree, issue the promotesv
<VC_name>|set:<set_name> -pri high command, where:
◦ <VC_name> is the name of the virtual copy being promoted.
◦ <set_name> is the name of the virtual copy set being promoted.
◦ -pri <high|med|low> specifies the priority of the copy operation before it is started.
This option allows you to control the speed of the task. If this option is not specified, the
operation is started with default priority of medium. High priority indicates that the
operation will complete as fast as possible. Low priority indicates that the operation will
run slower than the default priority task. You can use the -pri option to raise the priority
of the task if your virtual volumes are unavailable and restoring access to the volume is
the highest priority. However, raising the priority of the task may impact host I/O
performance.
The priority of the task can also be changed after it is running with the settask command.
For more information about changing the priority of a running task, see “Setting the
Priority of a Running Task” (page 125).
For a complete list of options available for the createsv command, see the HP 3PAR InForm
OS Command Line Interface Reference and InForm OS Command Line Interface Help.
NOTE: The -halt option cancels a running virtual copy promotion operation. The RW parent
volume is marked with the cpf status which indicates that the promotion failed. The cpf status
can be cleared using the promotevvcopy command or by issuing a new instance of the
promotesv command. This option cannot be used in conjunction with any other option.
NOTE: To halt volume export, you must delete all VLUNs associated with the volume as described
in “Unexporting Virtual Volumes” (page 94). After you delete all VLUNs, you can use the volume
as the destination volume for a physical copy.
Virtual Copies 101