Well, that depends on how paranoid you are... while overwriting a sector probably renders the data on that sector unrecoverable, modern disk may 'disable' bad s

Well, that depends on how paranoid you are... while overwriting a sector probably renders the data on that sector unrecoverable, modern disk may 'disable' bad sectors, copying their contents to more reliable sectors. Few people would care to try to recover these things, but if you really are working with nuclear secrets...