Hi, again I hope this is not to basic.
 
I have a uml built, with out devfs enabled per the default.
 
I'm interested in making other fie systems so according to the steps I built an empty file
dd if=/dev/zero of=newfilesys seek=256 count=1 bs=1M
which created the proper file
then in the next step I did a
./linux ubd1=newfilesys and started things which booted fine <thanks for the inittab help:)>
then per the docs I tried to mkfs on /dev/ubd/1 which did not work.
 
This looks like a devfs pointer though.  Is this correct?
 
If so how would I then address the new disk, what device?  If so how to create if the device doesn't exist?
 
Thanks