Howdy- After both my housemates lost ~200gb of data each on two different hard drive failures in two days, I began feeling smug that I have a fully redundant system. ...Except for one drive. I have one 250gb drive that is not backed up, and contians all my ripped DVDs. Just today it has begun sleeping itself, after a period of inactivity. Actually, scratch that. It just sleeped itself in the middle of a movie. There was a little click like it was shutting off, and then the movie stopped. Anyway, why might this be? is it too hot? Is it beginning to fail (eek!)? I don't have the option checked in the Energy Saver preferences pane, so that can't be causing it. My other external is acting normally. Just yesterday I installed the most recent security update. Maybe that's the issue? Any ideas? EDIT: Actually, I'm getting quite worried. I just turned it off and on (it wouldn't allow me to eject it), and it did the same thing, after about 2 minutes of use. thanks.