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Nx boot failure

This topic provides information about a failure to POST and the Nx boot failure feature.

Configuration changes, such as added devices or adapter firmware updates, and firmware or application code problems can cause the server to fail the power-on self-test (POST). If the server fails to POST, the server responds in either of the following ways:

  • The server restarts automatically and attempts POST again.
  • The server hangs, and you must manually restart the server for the server to attempt POST again.

After a specified number of consecutive attempts (automatic or manual), the Nx boot failure feature causes the server to revert to the default UEFI configuration and start the Setup utility so that you can make the necessary corrections to the configuration and restart the server. If the server is unable to successfully complete POST with the default configuration, there might be a problem with the system board.

To specify the number of consecutive restart attempts in the Setup utility that will trigger the Nx boot failure feature, complete the following steps. The available values are 3, 6, 9, and Disable (disable Nx boot failure).

  1. From the Setup utility main menu, click System Settings.
  2. Click Recovery.
  3. Click POST Attempts; then, click POST Attempts Limit.
  4. Modify the configuration settings and click Save Settings; then, exit Setup.