Here is a small example :

with Ada.Streams.Stream_IO;

procedure Streams is

   use Ada;

   Max_Datas : constant := 100_000;
   type Datas is array (1 .. Max_Datas) of Integer;

   D : Datas := (1 | 2 | 4 | 6 | 8 => 50, others => 1);

   procedure Write_Stream is
      package Data_IO renames Ada.Streams.Stream_IO;
      F : Data_IO.File_Type;
   begin
      Data_IO.Create (F, Name => "tmp_s.data", Mode => Data_IO.Out_File);
      for I in D'Range loop
         Integer'Write (Data_IO.Stream (F), D(I));
      end loop;
      Data_IO.Close (F);
   end Write_Stream;

   procedure Write_Array_Stream is
      package Data_IO renames Ada.Streams.Stream_IO;
      F : Data_IO.File_Type;
   begin
      Data_IO.Create (F, Name => "tmp_a.data", Mode => Data_IO.Out_File);
      Datas'Write (Data_IO.Stream (F), D);
      Data_IO.Close (F);
   end Write_Array_Stream;

begin
    null;
end Streams;


Hope this helps,
Pascal.
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