I'm on my live CD at the moment.
Basically, I tried to change my graphics card to a newer one, and found that the new one was faulty, so I switched it back again. During this process, the hard disks were unplugged and replugged again. (I have 4 hard disks by the way)
Well now the grub can't load, it comes up with an error 21 (sometimes 22 depending on what the arrangement of SATA cables is). Well after booting into the liveCD, and running Gparted I can see that my 250GB hard drive which used to be split up into more or less 200GB for Ubuntu boot partition and 40GB for Windows (10GB swap) is now as one 232GB "unknown" filesystem with a little warning triangle next to it. And 7.84MB of unpartitioned space.
Is there any possible way to fix this? I don't know how it got corrupt - perhaps it got knocked inside the PC? I don't know but I want to know if Ubuntu LiveCD offers any way to fix this.
Surely all of my data is still there? I mean it can't just have gone. That's 250GB, some of it quite important, I'm not too keen to just start formatting...
I'll do that if the worst comes to the worst, but I'd rather not have to.
Thanks for any help you can give.