I am currently running debian xfce and I have 2 8tb drives together in UFS. But I have a problem now when I copy some files to the UFS drive it says error splicing file no space left on device. So I checked and one of my drives is full. I find this very strange when I use UFS that I would get a message saying that the drive is full when I have a lot of space left. What can I do to resolve this?