anchor.diff:       {group, compression}, {group, links}, copy,
        delayed_write, read_ahead, segment_read, segment_write,
        ipread, pid2name, interleaved_read_write, otp_5814,
  -     large_file, read_line_1, read_line_2, read_line_3,
  +     large_file, large_write, read_line_1, read_line_2, read_line_3,
        read_line_4, standard_io].
   
   groups() -> 
  
positive.code: 
  -export([altname/1]).
  
  -export([large_file/1]).
  
  -export([read_line_1/1, read_line_2/1, read_line_3/1,read_line_4/1]).
  
  
negative.code: 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  large_write(Config) when is_list(Config) ->
      run_large_file_test(Config,
  			fun(Name) -> do_large_write(Name) end,
  			"_large_write").
  
  do_large_write(Name) ->
      case erlang:system_info(wordsize) of
  	4 ->
  	    {skip,"Needs a 64-bit emulator"};
  	8 ->
  	    Size = 4*1024*1024*1024+1,
  	    Bin = <<0:Size/unit:8>>,
  	    ok = file:write_file(Name, Bin),
  	    {ok,#file_info{size=Size}} = file:read_file_info(Name),
  	    ok
      end.
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  
  
  response_analysis(Module, Function, Arguments) ->
  