I'm not sure but it sounds like you can't Backup and Restore to a X_Volume and then Rename the original Volume to Old_Volume and then rename the X_Volume to the original Volume name.

Why wouldn't this way work? The new Volume will have all the trustee rights because of the SMS backup and restore.

The reason I want to do it this way is because I want to leave the GroupWise on the SCSI Drives, but moving the rest.