I would like write some data recovery software

[neoedmund]

gel wrote:
> I would like to write some data recovery software as a learning thing.
> The sort of thing that you would use to recover data from a currupt HDD
> or floppy etc.  I would like to be pointed in the right direction as
> far as modules to use and suggested approaches.

what kind of recovery? disk broken into pieces and recover from it?