Root device does not exist

[Thomas Poindessous <poinde_t@epita.fr>]

I'm trying to reinstall a hurd box but I have some problems. I know these
problems have been answered a lot of time befor but I don't find the
answers and I'm a little tired today.
I have build my partition (hdd1) with mke2fs -o hurd -O none /dev/hdd1 and
after mounting, tar --same-owner -p -xvzf gnu-20000913.tar.gz (from
alpha.gnu.org tar of 13 sept). After I reboot, grub:
root (hd1,0) (I have a HD in hda, a CDROM in hdc and the hurd drive in hdd)
kernel /boot/gnumach.gz root=hd3s1 -s
module /boot/serverboot.gz

And during the boot: 
Partition check:
hd0: hd0s1 hd0s2
hd3: hd3s1

...
And:
Root device hd3s1 does not exist
Root device name ? [hd3s1]

What should I do ?


-- 
Thomas Poindessous
EpX asso GNU/Linux de l'Epita
epx@epita.fr && http://www.epita.fr/~epx