My Macbookpro started taking forever to boot tonight (like 30 minutes). I ran the disk utility from the OS X Disc and it could not solve the problem. It suggests that I back up and reformat the drive. This worries me a bit, because I am boot camped with a partition running windows for my employment apps and have never had to do this before. I believe that when I wipe the drive it will wipe my bootcamp partition. Is this correct? Can I simply wipe the OS X partition and reinstall? Any advice would be greatly appreciated.