If your root filesystem is on a LV, you should run 'vgmknodes' or 'vgscan --mknodes' to fix up the special files in /dev in your real root filesystem after finishing with your initrd.
i believe so doing this in devfs has no sense and will probably fail anyway.
--
Luca Berra -- bluca comedia it
Communication Media & Services S.r.l.
/"\
\ / ASCII RIBBON CAMPAIGN
X AGAINST HTML MAIL
/ \