So, I got those 3 foldera on disk3 that "don't exist" anymore and I've tried deleting them with rm -r /path/ but then I get input/output error. They look like this when I do a find or ls -al /path/ find: `/mnt/disk3/UnRaid/ssss': Input/output error d????????? ? ? ? ? ? ssss/ at the same time my log shows me this Nov 4 11:12:41 KL kernel: BTRFS critical (device md3): corrupt leaf: root=5 block=695271424 slot=112 ino=87804, name hash mismatch with key, have 0