Knowledge Article: ID B00020000: Failure reading device on system management bus

Description

The advanced management module cannot communicate with a device over the I2C bus. Typically, this is because a component on the specified device I2C bus cannot respond to the advanced management module.

Causes

An internal communication bus on the advanced management module has failed.

Implications

The advanced management module is not functioning properly.

Resolutions

Perform these steps:

1. If you have only one advanced management module installed and your chassis supports two management modules, try the management module in the other advanced management module bay.
   
   
2. Reseat the specified device (such as an I/O module or a power module).
   
   
3. Reseat the advanced management module.
   
   
4. Check the IBM Support Web page for any service bulletins that might be related to this problem.
   
   
5. Check the event log for additional errors related to the system management bus:

   a. If there are no other system management bus errors, replace the specified device.

   b. If there are system management bus errors for multiple components, replace the advanced management module.

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.