Disconnecting the existing DR group from the fabric
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You must disconnect the existing controller modules from the FC switches in the fabric.
This task must be performed at each MetroCluster site.
Disable the HBA ports that connect the existing controller modules to the switch fabric undergoing maintenance:
storage port disable -node node-name -port port-number
On the local FC switches, remove the cables from the ports for the existing controller module’s HBA, FC-VI, and ATTO bridges.
You should label the cables for easy identification when you recable them. Only the ISL ports should remain cabled.