The UCS 5100 series chassis is a critical component of the UCS solution and is fully redundant. The redundant components of the UCS chassis are as follows:

• Eight fans for proper airflow
• Four power supplies for power redundancy
• Two redundant IOM module slots for northbound connectivity
• Redundant midplane traces for data and management traces

It is very rare that the UCS chassis will fail completely. The most common failure suspects for the UCS chassis are components such as fan modules, power supplies, IOM modules, or blade servers inserted into the chassis. All UCS chassis components are hot pluggable, so in the case of a failure, the failed component can be replaced without disruption.