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• If neither LED is lit or flashing, check the drive backplane.
• 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 drive problems. If the activity of the LEDs changes, return to
step 1.
4. Make sure that the 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 SATA/SAS adapter and drives. When you start a server and press F1,
the Lenovo XClarity Provisioning Manager interface is displayed by default. You can perform drive
diagnostics from this interface. From the Diagnostic page, click Run Diagnostic ➙ Disk Drive Test.
Based on those tests:
• If the adapter 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 procedure to solve the problem.
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 "PMEM rules" on page 159 for
requirements).
• 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 PMEMs are installed:
a. Refer to "PMEM rules" on page 159 and see if the displayed memory fits the mode description.
b. All the saved data have been backed up, and created namespaces are deleted before any PMEM
is replaced or added.
c. Go to the Setup Utility, select System Configuration and Boot Management ➙ Intel Optane
PMEMs ➙ Security, and make sure security of all the PMEM units is disabled.
.
Chapter 7
Resolving installation issues
239
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