• 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 43
“Power off
the server
for this task”
on page 35
“ATTENTION:
Static Sensitive Device
Ground package before opening”
on page 45
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.
– Never hold two or more DIMMs together so that they touch. Do not stack DIMMs directly on top of
each other during storage.
– Never touch the gold DIMM connector contacts or allow these contacts to touch the outside of the
DIMM connector housing.
– Handle DIMMs with care: never bend, twist, or drop a DIMM.
Before removing a DIMM:
1. Identify the failed DIMM by either checking the event logs in UEFI setup or use the Lenovo XClarity
Controller Web console to browse the post event log. The event log contains information about the
location of the DIMM fault.
2. Place the node in maintenance mode by following the procedure
Node Shutdown in the Hardware
Replacement Documentation
.
3. Power off the node and if the cable management arm is not in place, disconnect all the cables.
4. Remove the appliance from the rack.
5. Remove the top cover.
6. If your server comes with an air baffle, remove it first.
To remove a DIMM, complete the following steps:
72
User Guide for ThinkAgile HX1321 Node ThinkAgile HX3321 Node
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