Lenovo ThinkSystem SR650 Series Setup Manual page 215

• If the adapter fails the test, replace the adapter.
Displayed system memory less than installed physical memory
Complete the following steps until the problem is resolved:
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.
• Memory mirrored channel does not account for the discrepancy.
• The memory modules are seated correctly.
• You have installed the correct type of memory.
• If you changed the memory, you updated the memory configuration 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.
b. Refer to "DC Persistent Memory Module (DCPMM) setup" on page 138 and see if the displayed
memory fits the mode description.
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 138).
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 memory modules, and then restart the server.
3. Check the POST error log:
• If a memory module was disabled by a systems-management interrupt (SMI), replace the memory
module.
• If a memory module was disabled by the user or by POST, reseat the memory module; then, run the
Setup utility and enable the memory module.
4. Run memory diagnostics. Power on the system and press F1 when the logo screen appears, the Lenovo
XClarity Provisioning Manager interface will start. Perform memory diagnostics with this interface. Go to
Diagnostics ➙ Run Diagnostic ➙ Memory test or DCPMM test.
When DCPMMs are installed, run diagnostics based on the current DCPMM mode:
• App Direct Mode
– Run DCPMM Test for DCPMMs.
– Run Memory Test for DRAM DIMMs.
• Memory Mode and Mixed Memory Mode
– Run DCPMM Test for App Direct capacity of DCPMMs.
– Run Memory Test for memory capacity of DCPMMs.
Note: DRAM DIMMs in these two modes act as cache, and are not applicable to memory
diagnostics.
.
Chapter 5 Resolving installation issues
211