If it's your hard drive, it might be repairable. I had a severe drive crash a few months ago and I thought all was lost, but I found a piece of software that repaired the problem AND saved EVERYTHING on my system. You can download the free trial. It will scan your system and tell you what it finds and what it can do. Then if you want it to fix the drive, you have to buy it. But it's one of the best $70 I ever spent, for sure. Of course, if the scan doesn't show any problems you don't have to buy it, which is good.
http://www.highergroundsoftware.com/