@Brink - Well I did the restore part of the tutorial. When that did not work I then tried what you mentioned and still no joy.
@houstonaccessco - Oh yes, I have back ups of just the data and I also have back up images. With 12TB, space is not an issue for me.
Thanks, but I just ended up wiping the drive and just doing a clean install again. Probably due any how. Everything is back up and running.