You must set cylinders. You can do this from the extra functions menu.
Disk disk0: 0 MB, 0 bytes 255 heads, 63 sectors/track, 0 cylinders, total 0 sectors Units = sectors of 1 * 512 = 512 bytes
Device Boot Start End Blocks Id System disk0p1 63 1574369 787153+ 82 Linux swap / Solaris disk0p2 1574370 20964824 9695227+ 83 Linux Partition 2 has different physical/logical endings: phys=(1023, 254, 63) logical=(1304, 254, 63)