Knowledge Article: ID B0E00C001: Blade %d throttled.

Description

The specified blade server has throttled; it is achieving lower power consumption by temporarily reducing the CPU throughput. This might be because the chassis has been set to acoustic mode (set from the Power Management page of the advanced management module Web interface), there is a problem with a power supply module, or the power supply module has been removed from the chassis.

Causes

The blade server has throttled, either for thermal or power reasons.

Implications

After the condition have been resolved, throttling will no longer occur, and a recovery event will be displayed in the event log.

Resolutions

Perform these steps:

1. Check the event log for other events related to the power module and resolve those messages.
2. If acoustic mode is set for the chassis:
   
   1. Check the room ambient temperature to ensure that it is within the operating specifications for the chassis.
   2. verify that all fan/blower modules are running. Replace fan modules if necessary.
   3. verify that a device or filler is installed in each bay in the front and rear of the chassis, and verify that there is nothing covering the bays. Any missing components can cause a major reduction in airflow for the blade server.
   4. Verify that there is nothing covering the media tray (that will disrupt the airflow to the ambient temperature sensor).
   5. Update the firmware for the advanced management module. You can find firmware on the IBM BladeCenter software and device drivers Web page.
   6. Update the firmware for the blade server.
   7. For all blade servers other than the JSxx blade servers, make sure the heat sink and CPU are secured on the system board.

      Note: Be careful when handling the heat sink and CPU, they can be extremely hot.

3. Verify that all power modules are functional (the DC LEDs are lit).
4. Reseat the blade server.
5. Check the IBM Support Web page for any service bulletins that might be related to this problem.

Additional information

To find additional troubleshooting help, visit the "IBM Support & downloads" Web site, select "BladeCenter" for "Browse products for support" panel. At "Support & downloads quick start" page, select your product for "Choose your products", and "Troubleshooting" for "Choose your page", then select "View your page" for "See your results". To narrow the results, search with keywords that are related to this article, such as "fail", "Chassis", etc. in the "Search support" field at the right panel.

To download the latest firmware or drivers, visit the "Fix Central" Web site, select "BladeCenter" for "Product Group" (from the pull-down lists), select your product for "Product" (from the pull-down lists), select your product machine type for "Product" (from the pull-down lists), and select your operating system for "Operating system" (from the pull-down lists). You can refine the search by selecting the category of the download of your interest from the "Refine results" list.