Comment 18 for bug 161126

Out of these functions in ddrescue
       -r reverse direction copy (default=forward)
       -w abort on Write errors (default=no)
       -a spArse file writing (default=no)
       -A Always write blocks, zeroed if err (default=no)
       -i interactive: ask before overwriting data (default=no)
       -f force: skip some sanity checks (default=no)
gddrescue have at least
 -S, --sparse
              use sparse writes for output file
       -R, --reverse
              reverse direction of copy operations

It has a --force switcher, but I have no idea if it does the same as for ddrescue. So missing are those options (on packages from 12.04):

       -w abort on Write errors (default=no)
       -A Always write blocks, zeroed if err (default=no)
       -i interactive: ask before overwriting data (default=no)
       -f force: skip some sanity checks (default=no)