I've found a few tutorials to reset the password on a xen guest using image files, such as this one: http://www.howtoforge.com/forums/showthread.php?t=28779
However I haven't had any luck with examples of modifying this to work with physical disks.
This guest is currently running. I'd appreciate it if you could start from listing the command to shutdown the guest from the host, all the way through to restarting the xen guest after it's root password has been changed.
also, not sure what this means, but on my local machine "xm" is the command used to interact with xen, not xe like I've seen in most tutorials.
Here is the disk line of the xen config file:
disk = [ "phy:/dev/sdb1,xvda,w" ]