Compute Nodes populated with TruDDR4 memory POST/UEFI event [5100B] unqualified DIMM serial number - Lenovo x86 Servers

Resolving The Problem

Source

RETAIN tip: H213342

Symptom

IBM System x and IBM Flex System compute nodes that utilize Intel Xeon E5-2600 v3 series Processor architecture paired with TruDDR4 memory provides verification of installed memory.

If the compute node detects the presence of unqualified TruDDR4 memory, the system will generate POST/UEFI Event [5100B] 'Unqualified DIMM Serial Number'.

IBM System x and IBM Flex System compute nodes populated with non TruDDR4 memory will report following message:

All systems that support TueDDR4 Dual In-Line Memory Modules (DIMMs) are affected.

(where DDR4 = double data rate fourth generation synchronous dynamic random-access memory, POST = Power On Self Test, IMM2 = Integrated Management Module II)

Affected configurations

The system may be any of the following Lenovo x86 servers:

• Flex System x240 M5 Compute Node, type 9532, any model, any AC1
• NeXtScale nx360 M5, type 5465, any model
• NeXtScale nx360 M5, type 5467, any model
• System x3500 M5, type 7382, any model
• System x3550 M5, type 5463, any model
• System x3650 M5, type 5462, any model

The system is configured with one or more of the following Options:

• 16 GB TruDDR4 Memory (2Rx4, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM Stretch Goal, Option part number 95Y4821, any model
• 16 GB TruDDR4 Memory (2Rx4, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM, Option part number 46W0796, any model
• 32 GB TruDDR4 Memory (4Rx4, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM, Option part number 46W0800, any model
• 4 GB TruDDR4 Memory (1Rx8, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM, Option part number 46W0784, any model
• 64 GB TruDDR4 Memory (4Rx4, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM, Option part number 95Y4812, any model
• 8 GB TruDDR4 Memory (1Rx4, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM, Option part number 46W0788, any model
• 8 GB TruDDR4 Memory (2Rx8, 1.2V) PC4-17000 CL 15 2133MHz LP RDIMM, Option part number 46W0792, any model

This tip is not software specific.

Workaround

1. If this information event is logged in the Integrated Management Module (IMM) or Unified Extensible Firmware Interface (UEFI) event log, the installed memory is not TruDDR4.

2. The memory installed may not be covered under warranty.

3. Without TruDDR4 memory, speeds supported above industry standards will not be enabled.

4. Contact the Local Sales Representative or Authorized Business Partner to purchase TruDDR4 memory and replace the unqualified DIMM(s).

5. After installing TruDDR4 memory the informational event listed above should not be seen.

IMPORTANT: DIMM identified as 'Unqualified' can not be replaced under warranty.

An overview of IBM's Limited Warranty for Machines can be found at the following URL:

http://www.ibm.com/systems/support/machine_warranties/index.html

Additional information

Starting with DDR4 Memory DIMMs, an unique identifier code will be written to the DIMMs Serial Presence Detect (SPD) that will allow the system's firmware (UEFI) to authenticate the source of the DIMM (that is, did the DIMM come from IBM/Lenovo), DIMMs sold to the users by IBM/Lenovo (including Options/replacement part numbers) will have unique identifier contained in the DIMM's SPD. The UEFI will check for the presence of this information and where not found will log the message above.