DISK="ada0"
cd /
/sbin/sysctl kern.geom.debugflags=16
umount /mnt/* /mnt
/sbin/gpart/gpart destroy -F $DISK
/bin/dd if=/dev/zero of=/dev/$DISK count=2 || exit 1
/sbin/fdisk -BI /dev/$DISK || exit 1
/bin/cat << EOF > /tmp/part
a: 1G     0    4.2BSD
b: 16G    *      swap
c: *  0    unused
d: 50G  *    4.2BSD
e: *  *    4.2BSD
EOF
/sbin/bsdlabel -wB /dev/${DISK}s1
/sbin/bsdlabel -R /dev/${DISK}s1 /tmp/part
/sbin/newfs /dev/${DISK}s1a || exit 1
/sbin/newfs -b 65536 /dev/${DISK}s1d || exit 1
/sbin/newfs -b 65536 /dev/${DISK}s1e || exit 1
/sbin/mount /dev/${DISK}s1a /mnt || exit 1
/bin/mkdir /mnt/usr /mnt/var
/sbin/mount /dev/${DISK}s1d /mnt/usr || exit 1
/sbin/mount /dev/${DISK}s1e /mnt/var || exit 1
/bin/mkdir /mnt/var/tmp
cd /mnt && ln -s var/tmp tmp