Long story short- I had to update my unraid server hardware (cpu, motherboard, ram, parity drive) and now I'm getting random reboots and need help figuring out why.

I'm re-using the hard drives except for one that failed, which I replaced with a new drive which is the parity drive.

The server seems to run fine, but I find that once a day it reboots and starts a parity check. I'm attaching my diagnostics if it helps, but I don't know how it would log relevant info when it powers off unexpectedly. Any advice appreciated.

tower-diagnostics-20241214-1125.zip

The syslog in the diagnostics is the RAM copy and only shows what happened since the reboot.   It could be worth enabling the syslog server to get a log that survives a reboot so we can see what happened prior to the reboot. The mirror to flash option is the easiest to set up, but if you are worried about excessive wear on the flash drive you can put your server’s address into the Remote Server field.

 

Reboots out of the blue are nearly always hardware related.

 

Thank you. I setup the syslog server, hopefully that provides some useful info.

Looks like rebooted again. I'm attaching the syslog files, hopefully this helps.

syslog syslog-1734206373 syslog-previous syslog-1734203812

I noticed XMP was enabled in the bios. Disabled that and rebooted. Hopefully that was it.

Sounds like something happening at a certain time at night which could be a scheduled event from a docker container, vm, plugin or script.  Suggest you run overnight with plugins and Docker and VM turned off.  If that proves stable, turn things on Docker and check stability again.  If not stable, then start turning off containers one at a time and test stability again.  This could take several days to isolate.

 

Incidentally, I see in logs some errors to usb 1-9

"usb 1-9: device descriptor read/64, error -71"

May or may not be related.

 

 

It rebooted again after I disabled XMP in BIOS, so that doesn't appear to be the culprit.

 

I only have 1 docker which is the plex media server

 

I have 3 plugins:

1- community applications

2- fix common problems

3- user scripts- all scripts are disabled. I was initially going to use this to enable syslog server but used the method referenced by @itimpi instead

 

I suppose I can disable the plex docker to see if that resolves anything. The family is currently using it so will do that later tonight or tomorrow morning.

 

I attached the new syslog files

Thanks

 

syslog-previous syslog

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

Other possibilities that can often cause spontaneous reboots are cooling and power. 

After much troubleshooting I changed my power supply and the server has been running for a couple of days now. Thanks for all your help.