6027-752 [E] Lost membership in cluster clusterName. Unmounting file systems.
Explanation
This node has lost membership in the cluster. Either GPFS™ is no longer available on enough
nodes to maintain quorum, or this node could not communicate with
other members of the quorum. This could be caused by a communications
failure between nodes, or multiple GPFS failures.
User response
See associated error logs on the failed nodes for
additional problem determination information.