So a while ago I was checking my hard drive with Disk Utility and it came up saying: "Error: The underlying task reported failure on exit" So I did a erase and install of OS X and I checked the hard drive again, and it said it was fine. That was about a week ago. I checked it again today and it's giving me the same message as before. I don't want to backup everything I have on my iBook and erase and install OSX again! Any ideas on how to repair it?