Some people fear monsters. Others are scared of the dark. But it's fatal error messages that terrify the masses. Check out these common, perplexing, and all-around-horrible messages that the best computer systems in the world use to tell us our data's time has come to pass into the afterlife. Hard drives don't live forever, so make sure you back up your data with Drobo - and enter for a chance to win a free backup system by liking them on Facebook.