Booting issue

So I turned off my pc last night when I went to bed, woke up this morning and I post and it loads a black screen (do not see a XP Pro Logo or anything) then I get:

A Disk Error Occoured
Press Ctrl + Alt + Delete To Restart

What could be wrong? I have a second HD with XP Pro on it and I cannot even boot off that, please help guys!

Boot from your xp disc and do a repair.

I am rebuilding my bootcfg atm, hopefully it works.

Got into windows, don't know whats wrong.