Switch back aggregates in a two-node MetroCluster configuration - FAS8200

Contributors netapp-martyh

After you have completed the FRU replacement in a two-node MetroCluster configuration, you can perform the MetroCluster switchback operation. This returns the configuration to its normal operating state, with the sync-source storage virtual machines (SVMs) on the formerly impaired site now active and serving data from the local disk pools.

This task only applies to two-node MetroCluster configurations.

  1. Verify that all nodes are in the enabled state: metrocluster node show

    cluster_B::>  metrocluster node show
    DR                           Configuration  DR
    Group Cluster Node           State          Mirroring Mode
    ----- ------- -------------- -------------- --------- --------------------
    1     cluster_A
                  controller_A_1 configured     enabled   heal roots completed
                  controller_B_1 configured     enabled   waiting for switchback recovery
    2 entries were displayed.
  2. Verify that resynchronization is complete on all SVMs: metrocluster vserver show

  3. Verify that any automatic LIF migrations being performed by the healing operations were completed successfully: metrocluster check lif show

  4. Perform the switchback by using the metrocluster switchback command from any node in the surviving cluster.

  5. Verify that the switchback operation has completed: metrocluster show

    The switchback operation is still running when a cluster is in the waiting-for-switchback state:

    cluster_B::> metrocluster show
    Cluster              Configuration State    Mode
    --------------------	------------------- 	---------
     Local: cluster_B configured       	switchover
    Remote: cluster_A configured       	waiting-for-switchback

    The switchback operation is complete when the clusters are in the normal state.:

    cluster_B::> metrocluster show
    Cluster              Configuration State    Mode
    --------------------	------------------- 	---------
     Local: cluster_B configured      		normal
    Remote: cluster_A configured      		normal

    If a switchback is taking a long time to finish, you can check on the status of in-progress baselines by using the metrocluster config-replication resync-status show command.

  6. Reestablish any SnapMirror or SnapVault configurations.