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.

Before you begin

About this task

You might want to erase the contents of your caching module before replacing it.

Steps

  1. Although data on the caching module is encrypted, you might want to erase any data from the impaired caching module and verify that the caching module has no data:
    1. Erase the data on the caching module: system controller flash-cache secure-erase run
    2. Verify that the data has been erased from the caching module: system controller flash-cache secure-erase show -node node_name
      The output should display the caching module status as erased.
  2. If the impaired node is part of an HA pair, 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 prompt Go to the next step.
    Waiting for giveback...

    Press Ctrl-C, and then respond y when prompted.

    System prompt or password prompt Take over or halt the impaired node:
    • For an HA pair, take over the impaired node 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.

    • For a stand-alone system: system node halt impaired_node_name
  4. If the system has only one controller module in the chassis, turn off the power supplies, and then unplug the impaired node's power cords from the power source.