burning a data CD under devfs?

[Peter S Galbraith <GalbraithP@dfo-mpo.gc.ca>]

xcdroast and gcombust both fail to create a data CD under devfs
as there are no /dev/sg* device files.

Does anyone know how to create a data CD under devfs?

Alternatively, what do I do to turn off devfs (long enough to
burn a CD?  rebooting?)

Thanks,
Peter