Comment 79 for bug 1185756

Well yes, there are already plenty of hints in this thread. The problem is that while having a config option to enable those compat binaries, those do not seem to be very well tested. I am working on it but its a bit of a mess. I think I got the ra script in a state now where it seems to work in the normal case but trying to use migrate from LCMC ended in a split-brain state.
Also LCMC seems to decide whether it allows to set up a drbd mirror based on some magic I have not yet figured out. So that gets deactivated as soon as one side installs the new package.