Yes, sorry was a bit vague, but was stressed up to the eyeballs! The Raid array is a Raid 5, so the data is safe. For now! I'm using Syncback to back up to a remote computer on a mapped network drive - this just backs up all the data on the drive. Hence I know all the users data is safe. But if another drive fails and we do lose the data, can we recover the Domain Controller, users profiles & the directory permissions from this back up - or should we be doing something else until we can get the tape drive fixed/replaced? Many thanks