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• If neither LED is lit or flashing, check whether the hard disk drive backplane is correctly seated. For
details, go to step 4.
• If the green activity LED is flashing and the yellow status LED is lit, replace the drive. If the activity of
the LEDs remains the same, go to step Hard disk drive problems. If the activity of the LEDs changes,
return to step 1.
4. Make sure that the hard disk drive backplane is correctly seated. When it is correctly seated, the drive
assemblies correctly connect to the backplane without bowing or causing movement of the backplane.
5. Reseat the backplane power cable and repeat steps 1 through 3.
6. Reseat the backplane signal cable and repeat steps 1 through 3.
7. Suspect the backplane signal cable or the backplane:
• Replace the affected backplane signal cable.
• Replace the affected backplane.
8. Run the diagnostics tests for the hard disk drives. When you start a server and press the key according
to the on-screen instructions, the LXPM is displayed by default. (For more information, see the "Startup"
section in the LXPM documentation compatible with your server at
.) You can perform hard drive diagnostics from this interface. From the Diagnostic page, click
overview/
Run Diagnostic ➙ HDD test/Disk Drive Test.
Based on those tests:
• If the backplane passes the test but the drives are not recognized, replace the backplane signal cable
and run the tests again.
• Replace the backplane.
• If the adapter fails the test, disconnect the backplane signal cable from the adapter and run the tests
again.
• If the adapter fails the test, replace the adapter.
Displayed system memory is less than installed physical memory
Complete the following steps until the problem is solved:
Note: Each time you install or remove a memory module, you must disconnect the server from the power
source; then, wait 10 seconds before restarting the server.
1. Make sure that:
• No error LEDs are lit on the operator information panel.
• No memory module error LEDs are lit on the system board.
• Memory mirrored channel does not account for the discrepancy.
• The memory modules are seated correctly.
• You have installed the correct type of memory module (see
Optane DC Persistent Memory (DCPMM) setup" in Setup Guide
(DCPMM) setup" on page 76
• After changing or replacing a memory module, memory configuration is updated accordingly in the
Setup Utility.
• All banks of memory are enabled. The server might have automatically disabled a memory bank when
it detected a problem, or a memory bank might have been manually disabled.
• There is no memory mismatch when the server is at the minimum memory configuration.
• When DCPMMs are installed:
a. If the memory is set in App Direct or Mixed Memory Mode, all the saved data have been backed
up, and created namespaces are deleted before any DCPMM is replaced.
* *
for requirements).
https://pubs.lenovo.com/lxpm-
"Specifications" on page 3
"DC Persistent Memory Module
.
Chapter 5
Resolving installation issues
or "Intel
135
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