On 4/10/2018 7:59 AM, bouke_1 wrote: > I quickly looked through the atari_probe routine in the Atari patch > code, and I may have found the logic error. At the bottom: > >      } /* no XGM so try ICD */ > +         else if (atr_part_valid (&table.icd_part[0], rs_hd_size) > +                  && atr_part_known (&table.icd_part[0], > atr_known_icd_pid)) { > +               for (i = 1; i < N_ICD; i++) { > +                       if (atr_part_trash (&table.icd_part[i], > rs_hd_size)) > +                               return 0; > +               } > +       } > + > +       return 1; > + } > > Correct me if I'm wrong (I know little about partitioning and less about > atari disks), but it looks if the partition (or whatever) does not check > out as "XGM" and either atr_part_valid  or atr_part_known  returns > false, the routine will return 1 (meaning: this checks out as an atari > disk). I'd say so. I can't reproduce the problem though by simply creating an image file and making the partitions as you describe. Can you send your whole MBR so I can try to reproduce it and see if fixing this logic error fixes it?