Using the HMC to perform a slow boot

Learn how to perform a slow boot using the HMC.

In some cases, you need to perform a slow-mode boot in order to perform extended diagnostic testing.
Note: A slow-mode boot might yield a new reference code on the control panel, or new errors in the service processor error log. When the server reports a new error code, record it for use in subsequent steps.
  1. Record any reference codes appearing on the control panel or HMC. See Collecting reference codes and system information for details.
  2. Shut down all logical partitions and the server. For instructions, see Powering off the managed system.
  3. In the navigation area, select Server and Partitions > Server Management.
  4. Select the server you want to perform a slow boot on.
  5. Select Selected > Properties.
  6. Click the Power-On Parameters tab.
  7. Under Advanced Options click show details.
  8. Record the current boot setting in the Power-on speed override box.
  9. Select slow in the Power-on speed override list.
    Note: These settings will apply to all future boots. After you complete the service action, change the settings back to what you recorded in step 8.
  10. Click OK.
  11. After you are done, return to the step in the procedure that caused you to perform a slow boot. This ends the procedure.
Parent topic: Performing a slow boot
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