[Pierre-Marie Baty]

I don't think fdisk caused the problem, to me it looks much more like some dust has moved to the wrong spot on your hard disk.

When a hard disk starts to lose sectors, it's HIGH TIME to pray Baah-khup and move the data to another safe disk. Bad sectors are caused because at some point a disk head went in contact with the surface (which normally should never happen, but because of dilatation and aging eventually it does), creating some dust which then spreads like a plague. Everytime your disk starts spinning, the dust rolls onto the surface and lands elsewhere. I tell you, it's a plague. Nothing to save. Your disk is lost, muthafuckin' lost. Back it up man, hurry. I've learned it the hard way.