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Replacing the controller module

You must review the prerequisites for the replacement procedure and select the correct one for your version of the ONTAP operating system.

Before you begin

  • All drive shelves must be working properly.
  • If your system is in a MetroCluster configuration, you must review the section "Choosing the correct recovery procedure" in the MetroCluster Management and Disaster Recovery Guide to determine whether you should use this procedure.

    MetroCluster management and disaster recovery

Shutting down the node

To shut down the impaired node, you must determine the status of the node and, if necessary, take over the node so that the healthy node continues to serve data from the impaired node storage.

If you have a cluster with more than two nodes,it must be in quorum. If the cluster is not in quorumor a healthy node shows false for eligibility and health, you must correct the issue before shutting down the impaired node.

  1. If AutoSupport is enabled, suppress automatic log creation by invoking an AutoSupport message:
    system node autosupport invoke -node * -type all -message MAINT=<em className="ph i">number_of_hours_down</em>h

    Example

    The following AutoSupport message suppresses automatic log creation for two hours: cluster1:
    *> system node autosupport invoke -node * -type all -message MAINT=2h

  2. Disable automatic giveback from the console of the healthy node: storage failover modify –node local -auto-giveback false

  3. Take the impaired node to the LOADER prompt:
    If the impaired node is displaying...Then...
    The LOADER promptGo to the next step.
    Waiting for giveback...Press Ctrl-C, and then respond y when prompted.
    System prompt or password prompt (enter system password)Take over or halt the impaired node:

    • For an HA pair, take over the impairednode from the healthy node: storage failover takeover -ofnode impaired_node_name

      When the impaired node shows "Waiting for giveback...", press Ctrl-C, and then respond y.

About this task

  • You must replace the failed component with a replacement FRU component you received from your provider.
  • You must be replacing a controller module with a controller module of the same model type. You cannot upgrade your system by just replacing the controller module.
  • You cannot change any drives or drive shelves as part of this procedure.
  • In this procedure, the boot device is moved from the impaired node to the replacement node so that the replacement node will boot up in the same version of ONTAP as the old controller module.
  • It is important that you apply the commands in these steps on the correct systems:
    • The impaired node is the node that is being replaced.
    • The replacement node is the new node that is replacing the impaired node.
    • The healthy node is the surviving node.
  • You must always capture the node's console output to a text file.

    This provides you a record of the procedure so that you can troubleshoot any issues that you might encounter during the replacement process.

  1. Replacing the controller module hardware
    To replace the controller module hardware, you must remove the impaired node, move FRU components to the replacement controller module, install the replacement controller module in the chassis, and then boot the system to Diagnostic menu.
  2. Setting and verifying system time after replacing the controller
    You should check the time and date on the replacement controller module against the healthy controller module in an HA pair, or against a reliable time server in a stand-alone configuration. If the time and date do not match, you must reset them on the replacement controller module to prevent possible outages on clients due to time differences.
  3. Running diagnostics
    After you have replaced a component in your system, you should run diagnostic tests on that component.
  4. Completing system restoration
    You must complete a series of tasks before restoring your system to full operation.
  5. Completing the replacement process
    After you replace the part, you can return the failed part to Lenovo, as described in the RMA instructions shipped with the kit.Contact technical support at Lenovo Data Center Support if you need the RMA number or additional help with the replacement procedure.