Lenovo Flex System x220, Installation And Service Manual

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PCIe adapters not recognized/functioning
Complete the following steps until the problem is solved:
1. Check the event log and resolve any issues related to the device.
2. See http://www.lenovo.com/ serverproven/ to make sure that the adapter is supported.
3. Make sure that the adapter is installed in a correct slot.
4. Make sure that the correct device drivers are installed for the device.
5. Resolve any resource conflicts if you are running legacy mode (UEFI).
6. Check http://www.lenovo.com/support for any service bulletins.
7. Make sure that any external connections to adapters are correct and that the connectors are not
physically damaged.
Performance problems
Use this information to solve performance problems.
Poor or slow network performance
Complete the following steps until the problem is solved:
1. Isolate which network (such as storage, data, and management) is operating slowly. You might find it
helpful to use ping tools or operating-system tools such as a task manager or resource manager.
2. Check for traffic congestion on the network.
3. Update the NIC device driver or the storage device controller device driver.
4. Use the traffic-diagnostic tools that are provided by the I/O-module manufacturer.
Operating-system performance
Complete the following steps until the problem is solved:
1. If you have recently made changes to the compute node (for example, updated device drivers or
installed software applications), remove the changes.
2. Check for any networking issues.
3. Check the operating-system logs for performance-related errors.
4. Check for events related to high temperatures and power issues; as the compute node might be
throttled to help with cooling. If it is throttled, reduce the workload on the compute node to help
improve performance.
5. Check for events related to disabled DIMMs. If you do not have enough memory for the application
workload, your operating system will have poor performance.
6. Make sure that the workload is not too high for the configuration.
Power-on problems
Use this information to solve power-on problems.
Single node does not power on
Complete the following steps until the problem is solved:
1. If you recently installed, moved, or serviced the computer node, reseat the compute node in the
bay. If the compute node was not recently installed, moved, or serviced, perform a virtual reseat
through the CMM
service command. For more information about the CMM service command,
see the "Flex System Chassis Management Module: Command-Line Interface Reference Guide" at
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Flex System x220 Compute Node Installation and Service Guide