Понеже съм тъп и забравям 
#kernel = "/usr/lib/xen/boot/hvmloader"
builder = 'hvm'
memory = 512
vcpus = 2
name = "xen"
vif = [ 'type=ioemu, bridge=xenbr0' ]
disk = [ 'phy:drbd0,xvda,w' ] #, 'file:/xen/gentoo.iso,hdc:cdrom,r']
#device_model = '/usr/lib/xen/bin/qemu-dm'
#boot='d'
vnc=1
#vncviewer=1
#dhcp = 'dhcp'on_poweroff='preserve'
#on_poweroff='restart'
