Luc,
Don't know about that command, but you should be able to use Vol Copy to do this. Create a vol on destination aggregate that is slightly larger than the source, offline, and restricted. Then use "vol copy start -S sourcevol destvol" to copy over. Then you can use vol rename to change the name of the destination, if necessary.
You can also do this with ndmpcopy or borrow a SnapMirror temp key.
I hope this helps.
