Whenever I finish with putting an image on floppy with dd and bs=512K and then try to verify that same floppy I'm told /dev/fd0 doesn't exist. It's like it went away. Haaven't managed to get a good verify yet either. The sync command doesn't help this problem either. In all cases when doing this kind of operation I have and do listen for and wait for the write or verify process to come to a stop.