You must start SF Oracle RAC on each node to bring up the cluster configuration with I/O fencing enabled.
You must start VCS, CVM, and CFS on all nodes in the cluster.
To start VCS, CVM, and CFS on a node
After setting up I/O fencing and starting VCS, CVM, and CFS on each node, verify GAB port membership.
See Table 4-5, "GAB port description," on page 111.
gabconfig -a
command.
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Port a gen ada401 membership 0123
Port b gen ada40d membership 0123
Port d gen ada409 membership 0123
Port f gen ada41c membership 0123
Port h gen ada40f membership 0123
Port o gen ada406 membership 0123
Make sure the cvm group is in the online state.