Lenovo ThinkSystem SR950 Setup Manual page 162

c. If DCPMMs are recently set in Memory mode, turn it back to App Direct mode and examine if
there is namespace that has not been deleted (see "DC Persistent Memory Module (DCPMM)
setup" on page 69).
d. Go to the Setup Utility, select System Configuration and Boot Management ➙ Intel Optane
DCPMMs ➙ Security, and make sure all the DCPMM units are unlocked.
2. Reseat the DIMMs, and then restart the server.
3. Run memory diagnostics. When you start a server and press F1, the Lenovo XClarity Provisioning
Manager interface is displayed by default. You can perform memory diagnostics from this interface.
From the Diagnostic page, click Run Diagnostic ➙ Memory test.
4. Check the POST error log:
• If a DIMM was disabled by a systems-management interrupt (SMI), replace the DIMM.
• If a DIMM was disabled by the user or by POST, reseat the DIMM; then, run the Lenovo XClarity
Provisioning Manager and enable the DIMM.
5. Run memory diagnostics. When you start a solution and press F1, the Lenovo XClarity Provisioning
Manager interface is displayed by default. You can perform memory diagnostics with this interface.
From the Diagnostic page, go to Run Diagnostic ➙ Memory test or DCPMM test.
Notes: When DCPMMs are installed, run diagnostics based on the mode that is set presently:
• App Direct mode:
– Run Memory Test for DRAM memory modules.
– Run DCPMM Test for DCPMMs.
• Memory and Mixed memory mode:
Run both Memory Test and DCPMM Test for DCPMMs.
6. Move the suspect DIMMs in one channel to another channel of the same processor that is a supported
configuration, and then restart the server. If the problem is related to a memory module, replace the
failing memory module.
Note: When DCPMMs are installed, only adopt this method in Memory mode.
7. Replace the DIMM.
8. Restart the server.
A Lenovo optional device that was just installed does not work.
1. Make sure that:
• The device is supported for the server (see
• You followed the installation instructions that came with the device and the device is installed
correctly.
• You have not loosened any other installed devices or cables.
• You updated the configuration information in system setup. When you start a server and press F1 to
display the system setup interface. Whenever memory or any other device is changed, you must
update the configuration.
• Make sure that the latest levels of device firmware and device drivers are installed. See "Update the
firmware" on page 142 information.
2. Reseat the device that you just installed.
3. Replace the device that you just installed.
Voltage planar fault is displayed in the event log
Complete the following steps until the problem is solved.
158
ThinkSystem SR950 Setup Guide
http://www.lenovo.com/us/en/serverproven/
).