Hi sydq,
During a backup, if your source is multiple VMDKs from different datastore and your destination is a single datastore, then this is the only way I could easily backup and store the different sources. Upon restore, you will need to relink the disks because you may go back to the original setup OR if you had a complete disaster in your original site, your restore may go back to a single datastore. Currently this can be automated by using ghettoVCB-restore script which will automatically re-link the VMDKs for you but it only provides a single destination datastore.