Hi & welcome to the forums!
In both cases:
1. Create target volume (if within the same filer the name must be different than the source)
2. Dismount the LUNs from the hosts (to make sure everything is in a consistent state)
3. Use ndmpcopy to copy the entire source vol (containing your LUNs) to the target vol
(http://now.netapp.com/NOW/knowledge/docs/ontap/rel732_vs/html/ontap/tapebkup/protecting/task/t_oc_prot_copying-data-using-ndmpcopy.html)
4. Mount LUNs from the target vol to the hosts
5. If all works fine, destroy source vol / LUNs
Regrads,
Radek