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Comment by oneshtein | Hacker News Reader

My `dmesg` tells:

    EDAC MC0: Giving out device to module igen6_edac controller Intel_client_SoC MC#0: DEV 0000:00:00.0 (INTERRUPT)
    EDAC MC1: Giving out device to module igen6_edac controller Intel_client_SoC MC#1: DEV 0000:00:00.0 (INTERRUPT)

but `dmidecode --type 16` says:

    Error Correction Type: None
    Error Information Handle: Not Provided

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To be honest I don't know how Intel works, my post is limited to AMD.

Are you sure you have ECC-capable DIMM installed?

What does

    find /sys/devices/system/edac/mc/mc0/csrow* -maxdepth 1 -type f -exec grep --color . {} +

report?

AFAIK, I have 2x DDR5 non-ECC memory (`dmidecode --type 17` says Samsung M425R1GB4BB0-CQKOL). Your command tells about SECDEC (single bit error correction, double bit error detection).

    /sys/devices/system/edac/mc/mc0/csrow0/ce_count:0
    /sys/devices/system/edac/mc/mc0/csrow0/ch0_dimm_label:MC#0_Chan#0_DIMM#0
    /sys/devices/system/edac/mc/mc0/csrow0/size_mb:8192
    /sys/devices/system/edac/mc/mc0/csrow0/ch0_ce_count:0
    /sys/devices/system/edac/mc/mc0/csrow0/ue_count:0
    /sys/devices/system/edac/mc/mc0/csrow0/mem_type:Unbuffered-DDR3
    /sys/devices/system/edac/mc/mc0/csrow0/edac_mode:SECDED
    /sys/devices/system/edac/mc/mc0/csrow0/ch1_ce_count:0
    /sys/devices/system/edac/mc/mc0/csrow0/ch1_dimm_label:MC#0_Chan#1_DIMM#0
    /sys/devices/system/edac/mc/mc0/csrow0/dev_type:x16

> find /sys/devices/system/edac/mc/mc0/csrow* -maxdepth 1 -type f -exec grep --color . {} +

It looks like DDR5 supports SECDEC by default. :-/

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