> Fedora 13 does save the guest on shutdown so I would expect this will be > supported in RHEL6/CentOS 6 too. But when do you actually power down a > RHEL/CentOS server? And if you did, wouldn't you have migrated the > guests to another box already? > mainly it is an issue for a quick reboot of the host for a kernel update. i guess migration is an option for that as well, but not everyone has that much hardware.