Just after "xm create -c /root/rhel.cfg"

cat /root/rhel.cfg

name='rhel'
kernel='/boot/vmlinuz-2.6.32-19.el6.x86_64'
disk=[
'file://root/rhel6.img,sda,w'
]

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Committer: root <root@server.(none)>
#
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	new file:   domain-builder-ng.log
#	new file:   xen-hotplug.log
#	modified:   xend.log
#	modified:   xend.trace
#	modified:   xenstored-trace.log
#
