Over the past few weeks, I've noticed that my Unraid server has randomly rebooted. I've been monitoring it, setup Syslog to write to flash, etc. But I can't figure out what is causing the issue. Earlier this week I updated to the latest version of Unraid (was previously on 7.0.0) and did a BIOS update to my motherboard, but no luck.

My guess it's a power issue, but it's hooked up to an APS that has a newer battery in it. I tested by killing power to the APS and Unraid still runs with plenty of time left. I'm hoping someone can help with the log files and see what I'm missing.

syslog syslog-previous tower-diagnostics-20250912-0938.zip

Server rebooting on its own is almost always a hardware issue. Start by running memtest, or memtest is only definitive if it finds errors, and since you have multiple RAM sticks, try using the server with just one, if the same try with the other one, that will basically rule out bad RAM.

Sounds good. I'll run that and report back.

Update - still having random reboots.

What I've done so far:

• I ended up running Memtest for 48 hours and no issues were found.

• I ended up contacting Corsair and they replaced both memory modules - installed a week ago

• Purchased a PSU tester, checked the power supply and everything came back normal.

I had my last random reboot on Oct 11.

I have attached my latest diag to this post. I have considered going with a fresh start - maybe there is something running that is causing the reboot that I can't pinpoint. But I wanted to maybe rule out anything else before going down that route.

(I remember as a kid, my Dad would reinstall Windows 95 every month on his laptop since he liked how quickly a fresh start gave him. I thought he was crazy at the time. Now, I'm starting to think he wasn't that crazy.)

tower-diagnostics-20251013-0928.zip

13 minutes ago, ryryonline said:

maybe there is something running that is causing the reboot that I can't pinpoint.

Don't think that's very likely, but it won't hurt to try.

Funny. About 5m after posting this, it randomly rebooted again. Syslog doesn't seem to be capturing the event. At this point, maybe I point a camera at the monitor and have it activate once it detects motion.

As far as motherboard settings I disabled all the sleep settings. There is a motherboard overheat setting that I might try disabling and kick up the fans to max. I don't think it's been overheating but I'm trying to rule out as much as I can.

I don't have any reason to specifically think this, but a failing USB can cause some pretty random problems. Might be worth looking into.

2 hours ago, ryryonline said:

Syslog doesn't seem to be capturing the event.

This is expected with hardware issues.

I was having random errors with one of the hard drives. When I pulled it I noticed a bracket that was protecting the pins was cracked and a pin was bent. Regardless, I left it out and it seemed okay. But a few days later the reboots were happening again.

I have adjusted the voltage on the chip to be fixed and that didn't work either.

Today, I pulled everything apart, inspected the motherboard, reseated the CPU and the memory and put it all back together. I hope that helps.

What I have noticed is that when I power the server down and make some physical tweaks, the server remains stable for a few days. After those days, I tend to get reboots 1-3x per day. I've been monitoring temperatures but they aren't out of the ordinary. It might just be a coincidence, but I wanted to mention it in case it means anything.

Everything was stable as of October 29th. Then I had a reboot. And then another one 8 hours later. I'm going to try a hard power down and up to see if it stays stable for multiple days.

At this point, my only thoughts would be I need to replace the motherboard and/or processor. Is there anyway to test either one of those components?