@Fmstrat @veeesix Since there's two very diffrent questions there.. The first, "where do the failures happen?": anywhere. It could be the controller dying (in which case the platters themselves are fine if you replace the board, but otherwise the whole thing is toast). It could be the head breaking. It could be issues with a specific platter. It could be something that affects _all_ the platters (like dust getting inside the sealed area). So basically, it very much depends.