Topic: updating via src, mountroot on reboot

I have a 7.0-STABLE system on amd64 that runs 2 sata drives via gmirror

2 days ago I cvsup'd using stable-supfile (RELENG_7)

did this (from handbook)

# cd /usr/src
# make buildworld
# make buildkernel
# make installkernel
# shutdown -r now

and now the boot isn't seeing the gmirror boot partitions, when I type '?" it only shows the ad4 and ad6 slices

the statement to load gmirror is still in /boot/loader.conf

Any ideas on what went wrong here ?