profchaos Posted March 10, 2020 Share Posted March 10, 2020 Hey folks, I recently upgraded my unraid server switching from an i3 to a ryzen 1600x i had on my main machine. After the hardware upgrade the system now crashes periodically. I thought it was an issue running the old install so I reinstalled unraid but am getting the same results. After going through the logs myself and seeing what else is being suggested on this forum the fix is probably to replace the cpu, but i wanted to get a second opinion before buying a new cpu. It seems to occur on both a sa fe boot and normal boot. Any thoughts from the attached logs? Thanks in advance for the help. syslog Quote Link to comment
JorgeB Posted March 10, 2020 Share Posted March 10, 2020 See if this helps: https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=819173 Quote Link to comment
Maxrad Posted March 10, 2020 Share Posted March 10, 2020 I experienced the crashing you describe with my Ryzen 1700X build. I applied the small fix to overcome an idiosyncrasy with the first generation Ryzen processors impacting Unraid. You might find this thread helpful with more information about this issue. There might be other threads in this forum with a better explanation. You might try the following. Shutdown Unraid, pop your Unraid USB flash drive into another computer and carefully modify the syslinux.cfg file to add a boot parameter "rcu_nocbs =0-11" The parameter "rcu_nocbs =0-11" would be suitable for the Ryzen 1600X CPU (a 12 thread CPU). As an example here is my syslinux.cfg file containing the appended boot command appropriate for the Ryzen 1700X (a 16 thread CPU): default menu.c32 menu title Lime Technology, Inc. prompt 0 timeout 50 label unRAID OS menu default kernel /bzimage append rcu_nocbs=0-15 initrd=/bzroot label unRAID OS GUI Mode kernel /bzimage append rcu_nocbs=0-15 initrd=/bzroot,/bzroot-gui label unRAID OS Safe Mode (no plugins, no GUI) kernel /bzimage append initrd=/bzroot unraidsafemode label unRAID OS GUI Safe Mode (no plugins) kernel /bzimage append initrd=/bzroot,/bzroot-gui unraidsafemode label Memtest86+ kernel /memtest syslinux.cfg lines 1-19/19 (END) My Ryzen 1700X build running Unraid has been rock-solid ever since. I'm very impressed with Ryzen CPUs and Unraid. I hope you find this suggestion helpful. Quote Link to comment
profchaos Posted March 10, 2020 Author Share Posted March 10, 2020 Thank you both. I will change the settings of the bios first then the config to validate the fix. Quote Link to comment
profchaos Posted March 15, 2020 Author Share Posted March 15, 2020 Looks like the change to the bio did it. I have been stable now for several days longer than the previous record. Thank you both very much! Quote Link to comment
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