Dimm Replacement; Remove A Dimm - Lenovo ThinkAgile HX1521-R User Manual

After installing the PCIe adapter on the riser assembly:
1. Reinstall the riser assembly.
2. Replace the top cover.
3. Install the node back into the rack and reconnect all cables.
4. Power on the node.
5. Exit maintenance mode.
6. Verify that the NIC is replaced successfully:
• The amber warning light on the node front panel is off.
• All network ports are fully functional.

DIMM replacement

Use this information to remove and install a DIMM.
A node might be able to self-correct for certain memory errors, however, failed memory can lead to system
degradation and should be quickly replaced.
The following memory options are available:
• ThinkSystem 8GB TruDDR4 2666 MHz (1Rx8 1.2V) RDIMM
• ThinkSystem 16GB TruDDR4 2666 MHz (1Rx4 1.2V) RDIMM
• ThinkSystem 16GB TruDDR4 2666 MHz (2Rx8 1.2V) RDIMM
• ThinkSystem 32GB TruDDR4 2666 MHz (2Rx4 1.2V) RDIMM
• ThinkSystem 64GB TruDDR4 2666 MHz (4Rx4 1.2V) LRDIMM
Indications of a failed DIMM are:
• The Nutanix Prism Web console shows a memory error.
• A post error on boot.
• An error in the Lenovo XClarity Controller interface.
• Not all memory is detected. For example, the appliance should have 256 GB per node and the host only
shows 240 GB

Remove a DIMM

Use this information to remove a DIMM.
"Read the
installation
Guidelines" on
page 41
Attention:
• Disconnect all power cords for this task.
• DIMMs are sensitive to static discharge and require special handling. In addition to the standard
guidelines for Handling static-sensitive devices:
– Always wear an electrostatic-discharge strap when removing or installing DIMMs. Electrostatic-
discharge gloves can also be used.
"Power off
the server
for this task"
on page 33
Chapter 8
"ATTENTION:
Static Sensitive Device
Ground package before opening"
on page 43
.
Hardware replacement procedures
75