Knowledge Article: ID B00015800: Management bus hang

Description

Management bus hang detected by both Chassis Management Modules.

Causes

Both Chassis Management Modules (CMMs) detected a communication problem on the I2C management bus. A device on the I2C bus might be unresponsive.

Implications

The CMM will not failover again in an attempt to communicate with devices.

Resolutions

Perform these steps:

  1. Solve errors in the Chassis Management Module event log pertaining to previous I2C messages that describe a specific problem.

Additional information

To find additional troubleshooting help, visit the "IBM Support & downloads" Web site. At "IBM Support Portal: Quick start" page, select Browse for "Choose your products", select your Chassis from PureFlex System under the Hardware list, and "Troubleshoot" for "Choose your page", then select "Continue" 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.