Shinobu Posted May 25, 2023 Share Posted May 25, 2023 Hi, I'm having an issue with unRAID hanging on boot after changing CPU. It loads part way but then will just hang with no further progress. System is booting from UEFI, as it did before the upgrade. It seems like it outright freezes rather than hanging to be honest. Sometimes it will freeze at different times. Booting into safe mode makes no difference. Suggestions welcome It sometimes gets a weird graphical error where the loading /bzroot...OK stays on the screen when it freezes System specs: Intel Xeon E5-2697Av4 (old CPU was Intel Xeon E5-2690v3) Asus X99 WS IPMI 128GB 2133MHz ECC RDIMM LSI SAS HBA Mellanox X3 Connect See attached image for where it gets stuck. It's not always in the same place Quote Link to comment
JorgeB Posted May 25, 2023 Share Posted May 25, 2023 Make sure the BIOS correctly supports that CPU, if yes try the old one, if it boots again could be a CPU issue. Quote Link to comment
Shinobu Posted May 25, 2023 Author Share Posted May 25, 2023 2 minutes ago, JorgeB said: Make sure the BIOS correctly supports that CPU, if yes try the old one, if it boots again could be a CPU issue. It's on the latest BIOS, with support for E5-2600v4 processors so should be okay there. Going to try booting into a fresh install to see if that works, then possibly do a restore. Quote Link to comment
Solution Shinobu Posted May 25, 2023 Author Solution Share Posted May 25, 2023 4 hours ago, JorgeB said: Make sure the BIOS correctly supports that CPU, if yes try the old one, if it boots again could be a CPU issue. Found it to be a faulty core. Narrowed it down to core 11 being defective. System boots with core 11 disabled but fails with it enabled. Seller's accepted a return so will look for a replacement. Quote Link to comment
Derek_ Posted May 26, 2023 Share Posted May 26, 2023 How do you see if a core is defective? I'm about to change hardware, so i'm researching possible gotchas. Quote Link to comment
Shinobu Posted May 26, 2023 Author Share Posted May 26, 2023 4 hours ago, Derek_ said: How do you see if a core is defective? I'm about to change hardware, so i'm researching possible gotchas. On mine, it was reporting MCE errors for core 13. Though the way the Linux kernal and the BIOS sees cores is different it seems. I went through each core until I found that core 11 was causing the problems. If I disable core 11, system boots fine. As soon as I re-enable it, system will fail to boot. Quote Link to comment
Derek_ Posted May 26, 2023 Share Posted May 26, 2023 12 minutes ago, Shinobu said: I went through each core until I found that core 11 was causing the problems. How does one do that? Was the messaging you showed during the boot? You had a monitor attached and watched it boot (or fail to)? Quote Link to comment
Shinobu Posted May 26, 2023 Author Share Posted May 26, 2023 50 minutes ago, Derek_ said: How does one do that? Was the messaging you showed during the boot? You had a monitor attached and watched it boot (or fail to)? That was during booting into unRAID, yes. I control my server via an IPMI interface over the network, but having a monitor plugged in while it's booting would accomplish the same thing 1 Quote Link to comment
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