[Users] proper way to move nfs data storage domain?

Two examples; 1) I need to move the nfs data domain to a new server, whats the best way? 2) I think this applies the same as above, if I need to rename the nfs server hostname, whats the best way? I managed to "export/import" the export and iso domains and have them up and running on the new server, however, since you can't import a data domain, i'm wondering whats the best method for this. thanks