@PG:
Usually, this is only required to stop large files from getting corrupted with buggy/bad IDE harddrives with the builting A600/A1200/A4000 IDE-controller, but as it happens only with large files, try setting the MaxTransfer for your partitions to something like 0xFFFE (64kB - 2B). If that makes it work, you could also try 0x1FFFE (128kB - 2B).
/Patrik
