Messages in this thread | | | Date | Fri, 14 Apr 2023 09:46:46 -0400 | Subject | Re: AMD EPYC 25 (19h): Hardware Error: Machine Check: 0 Bank 17: d42040000000011b | From | Yazen Ghannam <> |
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On 4/14/23 06:24, Borislav Petkov wrote: > On Fri, Apr 14, 2023 at 11:26:27AM +0200, Paul Menzel wrote: >> It says “no action required”, > > Yes, it means you had a single bit flip in some DIMM and it got > corrected by the ECC so you don't need to do anything. > >> but out of the identical 14 servers with the same workload this is the >> only one having shown this errors three times. > > Or you could enable CONFIG_RAS_CEC and don't see those errors anymore. > > It all depends: a DIMM could be producing correctable errors for a long > time before going bad. If ever. If you don't want to risk whatever > you're running on that machine by a DIMM *potentially* going bad, sure, > you can replace it. That's a budget call. :) > >> Maybe the DIMM at bank 17 should just be replaced. > > Bank 17 is the CPU MCA bank which reports the error - not a DIMM bank. > In order to pinpoint the location, you should have amd64_edac loaded so > that it decodes to which DIMM. You could try loading that module and > injecting all errors you have to see what it says, it should work this > way too as the error signature has everything needed for decoding, > AFAICT. > > But Yazen can chime in here if I'm off. >
Yes, that's right with one caveat. The info from EDAC will show the channel/DIMM from the SoC/CPU's perspective. This may not match what is printed on the motherboard. The board vendor will need to provide that information.
Thanks, Yazen
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