remove CHUNK_BSD_COMPAT, it was a bad idea, and now its gone. remove DOSPTYP_ONTRACK, missed in OnTrack removal commit. unifdef -DHAVE_GEOM make tst01 compile again.
with the disk. GEOM will automatically retaste when we closet he filedesc.
own file and own copy of WriteDisk() to do things in. This should have happened years ago, instead of adding #ifdefs all over the place.