quorum disk configuration issue

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http://www.linuxquestions.org – Hi,All; Some stuff confused me when I configurated the quorum disk. I read the related documents abouth the quorum disk and I do not understand completely. So far now, I just do some quorum configuration like the below: <quorumd interval="3" label="rhcs_voting" tko="23" votes="1">; I have two nodes; os version RHEL5.2 Here comes my question, is the heuristic option really required? I don't understand its meaning. If I don't define the heuristic, what will happen if the heartbeat connection broken with cluster just the quorum disk configured? (HowTos)