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More MCE have been detected, most of them are from a certain logical CPU, is it possible that I have a defective CPU? Sep 18 23:22:24 Titanium-Server kernel: mce: [Hardware Error]: Machine check events logged Sep 18 23:22:24 Titanium-Server kernel: [Hardware Error]: Corrected error, no action required. Sep 18 23:22:24 Titanium-Server kernel: [Hardware Error]: CPU:1 (19:21:2) MC19_STATUS[-|CE|MiscV|-|-|-|-|-|-]: 0x89480000441f0f00 Sep 18 23:22:24 Titanium-Server kernel: [Hardware Error]: IPID: 0x0000000000000000 Sep 18 23:22:24 Titanium-Server kernel: [Hardware Error]: Bank 19 is reserved. Sep 18 23:22:24 Titanium-Server kernel: [Hardware Error]: internal: RESV Sep 19 12:17:54 Titanium-Server kernel: mce: [Hardware Error]: Machine check events logged Sep 19 12:17:54 Titanium-Server kernel: [Hardware Error]: Corrected error, no action required. Sep 19 12:17:54 Titanium-Server kernel: [Hardware Error]: CPU:1 (19:21:2) MC21_STATUS[-|CE|-|-|PCC|-|UECC|-|Poison|-]: 0x8217eac0c5348b48 Sep 19 12:17:54 Titanium-Server kernel: [Hardware Error]: IPID: 0x0000000000000000 Sep 19 12:17:54 Titanium-Server kernel: [Hardware Error]: Bank 21 is reserved. Sep 19 12:17:54 Titanium-Server kernel: [Hardware Error]: cache level: RESV, tx: GEN

Hello guys. I was recently notified by the Fix Common Problem plugin of Machine Check Events. Following its instructions, I then proceeded to check the syslog, in which I found the following error: Sep 12 21:18:46 Titanium-Server kernel: mce: [Hardware Error]: Machine check events logged Sep 12 21:18:46 Titanium-Server kernel: [Hardware Error]: Corrected error, no action required. Sep 12 21:18:46 Titanium-Server kernel: [Hardware Error]: CPU:1 (19:21:2) MC21_STATUS[-|CE|-|-|-|-|-|-|-]: 0x8000000005875163 Sep 12 21:18:46 Titanium-Server kernel: [Hardware Error]: IPID: 0x0000000000000000 Sep 12 21:18:46 Titanium-Server kernel: [Hardware Error]: Bank 21 is reserved. Sep 12 21:18:46 Titanium-Server kernel: [Hardware Error]: cache level: L3/GEN, tx: INSN System Spec is as follow: CPU : AMD Ryzen 9 5900X Memory : 64 GiB DDR4 Multi-bit ECC MB : ASUSTeK COMPUTER INC. ROG STRIX X570-E GAMING WIFI II Diagnostics is attached. What should I do next to diagnose the issue further? Any help is greatly appreciated. titanium-server-diagnostics-20230913-2227.zip

I did a BIOS update on my ASUS motherboard and UnRaid got stuck at the exact network message. Turns out the same culprit is vfio-pci.cfg as well. Guess IOMMU groups really got messed up after the BIOS flash. Found this post and fixed it under 10 minutes. Thank you all.