Has ever a hard-disk failed on you? That is the moment when your whole life re-runs in front of you. You try to remember: what did you save on that disk, is there some other copy? But what if this was your disk containing the backup of your workstation? This was the disk that should never-ever fail!
Well, I had to mourn such an incident, so I looked what could be done; read more at my article SMART monitoring on Windows