[issue1463] Mountroot before drives are initialized

[elekktretterr at exemail.com.au]

I havent tried it without natapicam. Im going to have to install FBSD 7 on
it for now as we are rushing to put this box in the datacentre. I realized
I cant put DragonFly on it because its going to run pgpool-II. The other
boxes all run 64bit OS, but all DragonFly builds are currently still only
32 bit and i was told that pgpool recovery(uses postgres PITR) is
architecture specific.

Petr