Hm. I can see the use of this, but I can also see issues with how
you
do updates for it sanely (if at all.)
Why would you do updates for it? Your install CD/DVD to use for rescue
boot doesn't get updated. I'd think you'd just install a pristine newer
one verbatim if you had a reason to bother, like deciding to burn a new CD.
Hence the nice automagic deployment feature would reserve two partitions
(or whatevers) for the purpose, so you can install the new image on B and
still have the option to boot A if the new one is bad.
Thanks,
Roland