Let's say files
copy are huge but identical files. In order to save storage space one could therefore either make
copy a soft-link to
orig or hard-link both files to the same data.
orig must never be modified, while in the future
copy may do so.
Can it be achieved that
copy becomes a files of its own again the instance modifications are made to it, thus keeping
orig unmodified at the expense of loosing the previously saved space again?