U.3 NVMe drive can be detected in NVMe connection, but cannot be detected in Tri-mode
In Tri-mode, NVMe drives are connected via a PCIe x1 link to the controller. To support Tri-mode with U.3
NVMe drives, U.3 x1 mode must be enabled for the selected drive slots on the backplane through the XCC
Web GUI. By default, the backplane setting is U.2 x4 mode.
Complete the following steps to enable U.3 x1 mode:
1. Log into the XCC Web GUI, and choose Storage ➙ Detail from the navigation tree on the left.
2. In the window that is displayed, click the icon
next to Backplane.
3. In the dialog box that is displayed, select the target drive slots and click Apply.
4. Do a DC power cycle to make the setting take effect.
Intermittent problems
Use this information to solve intermittent problems.
•
“Intermittent external device problems” on page 479
• “Intermittent KVM problems” on page 479
• “Intermittent unexpected reboots” on page 480
Intermittent external device problems
Complete the following steps until the problem is solved.
1. Update the UEFI and XCC firmware to the latest versions.
2. Make sure that the correct device drivers are installed. See the manufacturer's website for
documentation.
3. For a USB device:
a. Make sure that the device is configured correctly.
Restart the server and press the key according to the on-screen instructions to display the LXPM
system setup interface. (For more information, see the “Startup” section in the LXPM documentation
compatible with your server at
https://sysmgt.lenovofiles.com/help/topic/lxpm_frontend/lxpm_product_
page.html
.) Then, click System Settings ➙ Devices and I/O Ports ➙ USB Configuration.
b. Connect the device to another port. If using a USB hub, remove the hub and connect the device
directly to the compute node. Make sure that the device is configured correctly for the port.
Intermittent KVM problems
Complete the following steps until the problem is solved.
Video problems:
1. Make sure that all cables and the console breakout cable are properly connected and secure.
2. Make sure that the monitor is working properly by testing it on another compute node.
3. Test the console breakout cable on a working compute node to ensure that it is operating properly.
Replace the console breakout cable if it is defective.
Keyboard problems:
Make sure that all cables and the console breakout cable are properly connected and secure.
Mouse problems:
Chapter 8. Problem determination 479
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