Performance Problems - Lenovo Flex System x280 X6 Compute Node Installation And Service Manual

OS will not load via USB 3.0 port
The USB 3.0 port on the front of the box can not be used to install some OSs, in
particular, the Windows OSs, as the driver is not native to this OS and will require
a device driver to work. Other OSs, such as Linux should be ok.
1. Verify OS supports USB 3.0. Check with your OS provider to insure installs are
supported through USB 3.0.
2. Update OS USB driver to support USB 3.0
Related Links:
IBM Flex System and IBM PureFlex Firmware Updates Best Practices
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"Installing the USB flash drive" on page 757
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v "Installing the LAN over USB Linux device driver" on page 58
"Installing the LAN over USB Windows device driver" on page 56
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"Removing the USB flash drive" on page 756
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PCIe Adapters not recognized/functioning
Use this information to troubleshoot malfunctioning PCIe Adapters
1. Check the event log and resolve any issues related to the device.
2. See the IBM ServerProven website to validate that the adapter is supported.
3. Make sure that the adapter is installed in a correct slot.
4. Make sure that the proper device drivers are installed for the device.
5. Resolve any resource conflicts if running legacy mode (UEFI).
6. Check http://www.ibm.com for any service bulletins.
7. Ensure any adapter external connections are correct and that the connectors are
not physically damaged.
Related Links:
http://www-03.ibm.com/systems/info/x86servers/serverproven/compat/us/
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http://www.ibm.com/support
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Performance problems

Use this information to solve performance problems
Network adaptors plugged into I/O expansion connectors 3 or 4
exhibit slow performance.
PCIe connectors 3 and 4 only have 1 x 8 PCIe lanes. This creates a problem for
cards that require 2 x 8 lanes. Not all cards are supported in connectors 3 and 4.
1. Verify the cards in I/O connector 3 and 4 are not cards supported only in I/O
expansion connectors 1 and 2. The following link to the Service Guide describes
cards supported only in I/O expansion connector 1 and 2.
2. If the card is in the correctly supported connector, replace the card.
Related Links:
v "Installing an I/O expansion adapter" on page 742
"Removing an I/O expansion adapter" on page 741
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Poor or slow network performance
Use this information to troubleshoot poor or slow network performance.
Chapter 6. Troubleshooting
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