@johnnie.black My bad, I tried, but since I recived an error that I could not run on that device, I googled and it sugested that I would do it with "sde1". So I just asume that that was the correct way to do it :-p
I will put unraid in maintenance mode and give it a try within an hour, and we will see if that gives an other result.
Just to confirm: have i in anyway damaged the file-system by running xfs_repair on sde1 (note, sde1 is Data Disk 1)