6027-1598 Node nodeName was not added to the cluster. The node appears to already belong to a GPFS cluster.
Explanation
A GPFS™ cluster
command found that a node to be added to a cluster already has GPFS cluster files on it.
User response
Use the mmlscluster command
to verify that the node is in the correct cluster. If it is not, follow
the procedure in Node cannot be added to the GPFS cluster.