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Preparing for switchback in a MetroCluster IP configuration

You must perform certain tasks in order to prepare the MetroCluster IP configuration for the switchback operation.

About this task



  1. Setting required environmental variables in MetroCluster IP configurations
    In MetroCluster IP configurations, you must retrieve the IP address of the MetroCluster interfaces on the Ethernet ports, and then use them to configure the interfaces on the replacement controller modules.
  2. Powering on the equipment at the disaster site (MetroCluster IP configurations)
    You must power on the disk shelves and MetroCluster IP switches components at the disaster site. The controller modules at the disaster site remain at the LOADER prompt.
  3. Configuring the IP switches (MetroCluster IP configurations)
    You must configure any IP switches that were replaced.
  4. Verify storage connectivity to the remote site (MetroCluster IP configurations)
    You must confirm that the replaced nodes have connectivity to the disk shelves at the surviving site.
  5. Reassigning disk ownership for pool 1 disks on the disaster site (MetroCluster IP configurations)
    If one or both of the controller modules or NVRAM cards were replaced at the disaster site, the system ID has changed and you must reassign disks belonging to the root aggregates to the replacement controller modules.
  6. Booting to ONTAP on replacement controller modules in MetroCluster IP configurations
    You must boot the replacement nodes at the disaster site to the ONTAP operating system.
  7. Restoring connectivity from the surviving nodes to the disaster site (MetroCluster IP configurations)
    You must restore the MetroCluster iSCSI initiator connections from the surviving nodes.
  8. Verifying automatic assignment or manually assigning pool 0 drives
    On systems configured for ADP, you must verify that pool 0 drives have been automatically assigned. On systems configured that are not configured for ADP, you must manually assign the pool 0 drives.
  9. Assigning pool 1 drives on the surviving site (MetroCluster IP configurations)
    If drives have been replaced at the disaster site and the system is not configured for ADP, at the surviving site you need to manually assign remote drives located at the disaster site to the surviving nodes' pool 1. You must identify the number of drives to assign.
  10. Deleting failed plexes owned by the surviving site (MetroCluster IP configurations)
    After replacing hardware and assigning disks, you must delete failed remote plexes that are owned by the surviving site nodes but located at the disaster site.
  11. Performing aggregate healing and restoring mirrors (MetroCluster IP configurations)
    After replacing hardware and assigning disks, in systems running ONTAP 9.5 or earlier you can perform the MetroCluster healing operations. In all versions of ONTAP, you must then confirm that aggregates are mirrored and, if necessary, restart mirroring.