Alright so I have a late 2008 macbook that was running Snow Leopard. I tried updating to Lion and it all worked very smoothly, until my Macbook rebooted. After about 30 minutes of the installation loading bar barely moving, it gave me an error. It said "Macintosh HD is damaged and can not be repaired". Then, gave options to go back to Snow Leopard or try again. Frustrated, I tried again. Same result, but no option to go back to snow leopard. Only to show utilities. I've figured out how to get into Terminal, but that's just about all. Disk Utility won't repair my harddrive or erase it. Is there anyway I could do this with Terminal? Everything on my harddrive isn't of much value. I can redownload the few things I really need. I am really in need of help right now, and if anyone could help, I'd be sincerely thankful. I've searched and found people with similar problems, but not quite the same.