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https://bugzilla.redhat.com/show_bug.cgi?id=472676
--- Comment #4 from Paulo Roma Cavalcanti promac@gmail.com 2008-11-24 16:15:09 EDT --- (In reply to comment #3)
Definitely test and retry. No reason to only to 32-bit if it works.
Yes, it seems to work. I saved an unmounted /boot partition of a second disk, and had no problem. I think as long as people do not mix client x server architectures (e.g., when booting from a rescue CD), it should work (and without any patch, as was necessary in the past).
I have updated the links.