When LifeKeeper is operational, the system must not be taken directly to init state S. Due to the operation of the Linux init system, such a transition causes all the LifeKeeper processes to be killed immediately and may precipitate a fastfail. Instead, you should either stop LifeKeeper manually (using /etc/init.d/lifekeeper stop-nofailover) or take the system first to init state 1 followed by init state S.
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