Thanks for the posts, some great information. I am a new posting and replying to the post but have been reading them for at least two years. I hope I am replying to these in the proper manner. >>>> RUI Amaral wrote <<< >>>>Backing up to dedup device is precisely the same as backing up to a san ... EMC Rep told us the dedup device would present itself to RMAN as a 'TAPE' device. Our current ATA SAN disks are 'DISK' devices in RMAN. Any perceived disadvantages to that? Sorry I am not an RMAN guru. -- //www.freelists.org/webpage/oracle-l