I've had a problem a while ago about my hard drive just spinning it self down randomly causing the whole computer to just reboot. Since then I got a brand new hard drive thinking this would kill the problem but it is still there.
No matter what bit of the cable the hard drive is on, it is always Primary Master that will spin itself down.
For some reason I refuse to believe it's the motherboard that is stuffing up, because if it was the motherboard wouldn't it shut off everything that was on the Primary IDE channel?
Could it be a PSU dying? What can it be, I really can't figure it out.