Weak Membership design:

"6.4     To Switch from Weak to Strong membership model
    1. In order to switch from Weak to Strong membership model, the
cluster must be fully
 formed. In other words, both nodes must be up and both nodes must be
in the same cluster
 partition. The transition cannot be done while the cluster is in a
split-brain condition.
    2. Set the multiple_partitions property to false to switch to Strong
 membership.
          clq set -p multiple_partitions=false membership
    3. Now add a quorum device (quorum server or a shared disk) to provide
 high availability. Without a quorum device, any disconnect between
the cluster nodes or single
 node failure will result in complete cluster panic.
          clq add d3"

Well, I think 'clq add d3' should be in the first place so the proper
sequence would looks like:
# clq add d3
# clq set -p multiple_partitions=false membership

This prevents the cluster panic.

-- 
Regards,
Piotr Jasiukajtis | estibi | SCA OS0072
http://estseg.blogspot.com

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