8.16. Why can't I edit the disklabel on my ccd?

The symptom of this is:

        # disklabel ccd0
        (it prints something sensible here, so let's try to edit it)
        # disklabel -e ccd0
        (edit, save, quit)
        disklabel: ioctl DIOCWDINFO: No disk label on disk;
        use "disklabel -r" to install initial label
        #
      

This is because the disklabel returned by ccd is actually a `fake' one that is not really on the disk. You can solve this problem by writing it back explicitly, as in:

        # disklabel ccd0 > /tmp/disklabel.tmp
        # disklabel -Rr ccd0 /tmp/disklabel.tmp
        # disklabel -e ccd0
        (this will work now)