> Or you can use a normal fsck, let it set the size back down, and then > resize it again when you're done. That worked, thanks.
However, trying to mount -u -o reload / resulted in mount_ffs: /dev/raid0a on /: specified device does not match mounted device so I needed to reboot again (from single user). I still wonder how /etc/rc.d/resize_root handles this.
