Supertimer wrote.... <BR> > If you<BR> >format the Mac driver partition of a Mac formatted Zip disk like you just<BR> >did above (erasing it to a 5k ProDOS volume), that disk is no longer<BR> >readable on a Mac.<BR> <BR> Actually, when I formatted the 5k ProDOS volume it was readable on both systems. I will try your suggestions and GenEx and see what happens. Thanks. <BR> <BR> LJSilicon