Setting the HA mode on the existing controller module
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Install a fabric-attached MetroCluster
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Install a stretch MetroCluster configuration
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Transition from MetroCluster FC to MetroCluster IP
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You must use the storage failover modify command to set the mode on the existing controller module. The mode value is enabled later, after you reboot the controller module.
Steps
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Set the mode to HA:
storage failover modify -mode ha -node existing_node_name