One of my friends who isnt the best at PC's was in class (IST/ICT) and we were Rebuilding some old school machines and he asked me and my friend to come take a look at it, my friend goes up and see's an extra sata cable he asks if he got one of our teacher he said no, Turns out he had the optical drive plugged directly in to the Hard Drive and didn't have it going to the motherboard , my friend and i got a good laugh out of it