Hi guys I wonder if anyone can help with the following. I have a Power PC G5 which has just started making loud, high pitched clicking noises. It doesn't happen constantly but say every half hour. I've checked disc utilities and it varifies the drives ( I have two internal drives and two external ones) as ok. I'm worried that this might be one of the drives on the way out, what can I do? Should I add another drive to the unit and migrate everything over to that? If so what drive can I get for this model?