One of our Supermicro servers reports an error like this during POST:

Failing DIMM: DIMM location (Correctable memory component found)


I can also see this in the Health Event Log in the IPMI web interface:

Failing DIMM: DIMM location. (Correctable memory component found) (DIMMB2)

Until I rebooted it (for unrelated reasons), the server has been running fine, so I had no idea anything was wrong with its RAM. Is there any way to find errors like this without rebooting the server, e.g. some ipmitool command?

If not, is there a way to at least a scriptable way to see these errors after a server has been rebooted, i.e. without using the web interface? I tried ipmitool sel elist, but it shows these entries as "Unknown" events:

5 | 10/11/2019 | 11:21:25 | Unknown #0xff | | Asserted

Edit: I found that Supermicro's proprietary tool, IPMICFG, can show these events (IPMICFG-Linux.x86_64 -sel list) but it would still be nice to have a way to do this with ipmitool and, most importantly, without rebooting.

  • I just saw the same thing - in the same slot.. After restarting everything came back fine. Ive started a memory test 16 hours ago and so far no errors. Did you end up hacing faulty memory?
    – davidgo
    Mar 1 at 18:46
  • 1
    Yes, I did. Also, I realised there is probably no way to have IPMI detect it without rebooting, because it only reports what the POST memory test detected - which runs on boot.
    – EM0
    Mar 2 at 13:07

1 Answer 1


Try to use FreeIPMI instead (ipmi-sel for instance): there's a good chance it will give you more information than ipmitool as the codebase is much more maintained

  • Thanks, I tried that and ipmi-sel shows 9 | Oct-11-2019 | 11:36:33 | Sensor #255 | OEM Reserved | Event Offset = 00h ; Event Data3 = 05h. Better than ipmitool, but not exactly clear. If I'm going to use another tool anyway it might as well be IPMICFG. Anyway, the main problem is detecting this without reboots.
    – EM0
    Oct 14, 2019 at 11:35
  • 3
    FreeIPMI maintainer here, sorry late to respond. The "OEM Reserved" indicates that there are OEM specific things FreeIPMI has to map to get the 00h & 05h into English. You'll have to specify the --interpret-oem option to get them (assuming FreeIPMI supports those OEM specifics). In FreeIPMI 1.6.4 a bunch of DIMM mappings were supported in a number of Supermicro motherboards, so a newer version may be worth checking out.
    – Albert Chu
    Dec 31, 2019 at 19:30

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