I had the same thing happen to me. It was corrupt, I tried some things to get it back but had no luck. From looking around the web it's just one of those things that can happen when running a server. It doesn't happen every time. My dog has unplugged it once and it started back just fine. But the other time the power was out for like 30 seconds and that did it. I really don't want to buy a battery backup but that may be the only option to prevent this issue. Sorry for not being much help, but I feel your pain.