it shows that nothing is eternal, not even eternity, because it's only a concept. it has no validity.

no media will last forever, we just have to choose the best and hope for the best.

have you tried a data recovery program? whatever you haven't written over should come up, except the file names themselves.
to be sure you will not overwrite any of your "broken" files, don't write anything on the HDD before you run the recovery program.

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery