xm create etch.cfg -c
Using config file "/etc/xen/etch.cfg".
Error: Device 2049 (vbd) could not be connected. Backend device not found.



cat /etc/xen/etch.cfg
#
#  Configuration file for the Xen instance etch, created on
# Tue Sep 19 04:50:35 2006.
#


#
#  Kernel + memory size
#
kernel  = '/boot/vmlinuz-2.6.17-2-xen-686'
ramdisk = '/boot/initrd.img-2.6.17-2-xen-686'

memory  = '50'


#
#  Disk device(s).
#
root    = '/dev/sda1 ro'

disk    = [ 'file:/home/xen/domains/etch/disk.img,sda1,w', 'file:/home/xen/domains/etch/swap.img,sda2,w' ]

#
#  Hostname
#
name    = 'etch'


#
#  Networking
#
#vif  = [ 'ip=10.9.1.2' ]

#
#  Behaviour
#
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'



/etc/xen/xend-config.sxp hav only these two enabled
(network-script 'network-bridge netdev=eth0')
(vif-script vif-bridge)