[Fedora-xen] Re: DomU boot on Fedora 6 fails with 'no root found' error.

[master at bradleyland.com]

The problem comes about when you update the kernel with yum. In my
experience (like all good lessons, learned the hard way), the initrd is
created on the fly and does not include xenblk. You cannot just take the
initrd that ends up in the /boot directory and use it for your guest.
Doesn't work.

Now I know this, it's an easy matter to create a fresh initrd and include
the xenblk module. Maybe there's a smarter way to do this. If so, it
escapes me.