Re: One of my drives clicking.
Just read about this in an A+ cert. earlier today. Check the power connection going to the drives, a loose pin could cause this. Seeing as swapping the power cables fixed it last time, I would start there. Couldn't hurt to do a 2nd diagnostic scan, 2TB is alot of data to risk losing. As far as narrowing which drive is causing problems, there is no easy way that I am aware of. Just keep a careful ear open.