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ONTAP MetroCluster

Verifying a successful switchback

Contributors netapp-aoife netapp-thomi NetAppZacharyWambold netapp-aherbin
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After performing the switchback, you want to confirm that all aggregates and storage virtual machines (SVMs) are switched back and online.

  1. Verify that the switched-over data aggregates are switched back:

    storage aggregate show

    In the following example, aggr_b2 on node B2 has switched back:

    node_B_1::> storage aggregate show
Aggregate     Size Available Used% State   #Vols  Nodes            RAID Status
--------- -------- --------- ----- ------- ------ ---------------- ------------
...
aggr_b2    227.1GB   227.1GB    0% online       0 node_B_2   raid_dp,
                                                                   mirrored,
                                                                   normal

  2. Verify that all sync-destination SVMs on the surviving cluster are dormant (showing an operational state of “stopped”):

    vserver show -subtype sync-destination

    node_B_1::> vserver show -subtype sync-destination
                                 Admin    Operational  Root
Vserver       Type    Subtype    State    State        Volume    Aggregate
-----------   ------- ---------- -------- ----------   --------  ----------
...
cluster_A-vs1a-mc data sync-destination
                               running    stopped    vs1a_vol   aggr_b2

    Sync-destination aggregates in the MetroCluster configuration have the suffix “-mc” automatically appended to their name to help identify them.

  3. Verify the sync-source SVMs on the disaster cluster are up and running:

    vserver show -subtype sync-source

    node_A_1::> vserver show -subtype sync-source
                                  Admin    Operational  Root
Vserver        Type    Subtype    State    State        Volume     Aggregate
-----------    ------- ---------- -------- ----------   --------   ----------
...
vs1a           data    sync-source
                                  running  running    vs1a_vol  aggr_b2

  4. Confirm that the switchback operations succeeded by using the metrocluster operation show command.

    If the command output shows…​

    Then…​

    That the switchback operation state is successful.

    The switchback process is complete and you can proceed with operation of the system.

    That the switchback operation or switchback-continuation-agent operation is partially successful.

    Perform the suggested fix provided in the output of the metrocluster operation show command.

You must repeat the previous sections to perform the switchback in the opposite direction. If site_A did a switchover of site_B, have site_B do a switchover of site_A.