making new device names with mknod

Hi!

Can somebody tell me how to make new device names in /dev?
I have installed two additional ide controllers and want to make md
devices out of partitions on devices /dev/hde, /dev/hdg, /dev/hdi and
/dev/hdk. In /dev, there are only devices up to hdh. In addition to
that, I would need to make the /dev entries for the partitions.

Is it possible to use more than 16 md devices, how can I make /dev/md16
and so on?

I am using Debian Woody, so no makedev, only mknod is available.

I hope, I am not too off-topic, thanks, Norman.