Thilo Manske writes:
> Try
> disklabel /dev/wd1 > tempfile
> <edit tempfile>
> disklabel -R -r /dev/wd1 tempfile

# disklabel -R -r wd1 /tmp/disktmp 
Write outside MBR partition? [n]:  (I tried both 'y' and 'n')

# disklabel -r wd1
disklabel: no disk label

Variations on the 'wd1' theme such as /dev/rwd1d, /dev/wd1d seem to
not make any difference.

-wolfgang
-- 
Wolfgang Rupprecht    <wolfgang@wsrcc.com>     http://www.wsrcc.com/wolfgang/
DGPS signals via the Internet  http://www.wsrcc.com/wolfgang/gps/dgps-ip.html