anchor.diff:  
   %% @doc Delete all objects from this backend
   %% and return a fresh reference.
  --spec drop(state()) -> {ok, state()} | {error, term(), state()}.
  +-spec drop(state()) -> {ok, state()}.
   drop(State=#state{dir=Dir}) ->
  -    [file:delete(location(State, BK)) || BK <- list(State)],
  +    _ = [file:delete(location(State, BK)) || BK <- list(State)],
       Cmd = io_lib:format("rm -Rf ~s", [Dir]),
  -    os:cmd(Cmd),
  -    filelib:ensure_dir(Dir),
  +    _ = os:cmd(Cmd),
  +    ok = filelib:ensure_dir(Dir),
       {ok, State}.
   
   %% @doc Returns true if this backend contains any
  
positive.code:             ok
      end,
      Dir = filename:join([ConfigRoot,PartitionName]),
      {filelib:ensure_dir(Dir), #state{dir=Dir}}.
  
  %% @doc Stop the backend
  -spec stop(state()) -> ok.
  
negative.code:     list(S) == [].
  
  %% @doc Get the status information for this fs backend
  -spec status(state()) -> [no_status_sorry | {atom(), term()}].
  status(_S) ->
      [no_status_sorry].
  
  