If you are asking if you can move a VM from one storage device to another storage device the answer is yes. You need to make sure both devices have LUNS presented to Oracle VM and these need to be mounted and formated as Repositries in Oracle VM.
Once this is done just follow the steps in the Oracle Users Guide for moving VM's.
Hope this helps, Russell
I have two sets of storage, if active storage down, how to replace of standby storage？
Ok, I need more information.
Are the 2 storage devices using some form of replication to continuously sync changes between the two storage devices?
Are the 2 storage devices at different physical locations?
If you answer yes to both of these questions then I would suggest using the Oracle White Paper "Oracle VM3: Integrating Oracle VM into a Disaster Recovery Solution using SAN". I used this document and it works well. I only had one issue with the setup in the document and Oracle Support was able to help me with a work around.
If you answered no, can you please provide a description of how your storage devices are configured.
yes,2 storage devices is in some physical localtions and the 2 storage use some form of replication to continuously sync changes.replication methods, such as solaris avs.
this Oracle White Paper might be looking for me.