Lenovo HR330A Ampere eMAG physical RAM layout - APEI fatal memory errors

my beloved HR330A eMAG is reporting memory failures MCA / ECC failures in node 5 so I will presumably need to replace some RAM now. Hardware also reports this as S0_C5_D01_Status or MCU5_DIMM0

Question is - does anybody know how to map node 5 to one of the many physical memory slots in this machine? There are 16 slots, so guessing and testing is not ideal.

APEI Fatal Memory Error:
 Error Status: 0x400
 Node: 5
 Card: 0
 Bank: 0
 Row: 0
 Column: 0
 Memory Error Type: 3
 Rank Number: 0
 Flags: 0x1
 FRU Text: MCU5 {M-CU}
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Hi dch,
For my 350 the DIMM numbers are slikscreen on. Are you able to quickly check whether node 5 maps to DIMM 5? Or is the unit in a DC and you need to turn up and get it right first time?

I didn’t find anything in the manuals, nor inside, but it turns out the required information is on top of the case and I’d never noticed it - this attention to details is one of the reasons I love this piece of hardware. Thanks @vikingforties for the suggestion!

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Ah so it is, well spotted :slight_smile: I happened to have the lid off as I’m reorganising RAM.

sudo lshw -class memory does have some mapping of physical RAM slots but I can’t be sure it’s the right mapping.