I'll prefix this with saying yes I know it's not really an unraid issue, but I'm just hoping someone can point me in the right direction

 

Have a small unraid home server, recently moved house, before the move it had uptime of months and never restarted on it's own.
Since I've moved it's restarted 3 times completely randomly - there's nothing at all in syslog, just normal logs, then the startup logs, no errors or faults thrown.

 

I can't help but think it's something to do with the move, but I've powered it down and been through reseating all the ram, checking every cable, reseated all the pcie cards etc... with nothing logged I really don't know where to start. 
I'll try running a long memory test overnight tonight, but are there any "common culprits" or any other tests I can do?

Thanks

If you have another one available (or that you can borrow) it might be worth checking if the PSU is the culprit.   PSUs can degrade over time.

Thanks, I'll see if I can borrow one to swap out

I've taken the whole thing apart now - checked every cable, took all the RAM out and re-seated it - will see if it happens again, it seems to be very random  

I hate leaving threads where I don't follow up with an answer... so I'll update this but not with anything useful!

I took the server apart - re-seated all the memory, checked every cable connection, all the hard disk power and sata connectors - nothing seemed loose
Put it back together, and it restarted within 2 hours of running
then restarted again the next day

So I shut it down and rebooted it with a memtest usb stick and let it sit all night running the full memtest suite - as I suspected 0 errors found.
So I rebooted it back into unraid, and as of writing this, it's been up for 12 days without issue

Just one of those things I guess, no idea what was causing it  

Welp.... 13 days with no issues, was sat watching a Plex film a day ago and it froze, went upstairs to see if the server had rebooted and it hadn't it was still powered on and disks clicking away.

 

Couldn't SSH into it, web UI wouldn't load, couldn't ping it, and no video output on HDMI at all. Just completely hung up.
Had to force the power off and reboot, then literally as it was starting up docker containers it restarted again for no reason, still no logs.

I've updated Unraid to latest version now to see if maybe it fixes it, but I don't have high hopes  

Thought I'd close this off.

I had an electrician in yesterday so had to power off my server.
When I started it back up, the array came online, dockers started, then rebooted.
Next time array came up, started parity check, instantly rebooted.

I decided to revisit itimpi's suggestion about PSU - wondering if I'd added so many hard drives that my PSU was now out of capacity

Worked it all out to be about 560watts peak and I have a 650watt PSU (yeah, it's a bit close I'll get an upgrade soon) so should be fine

Then it hit me..... it's on a UPS. A UPC 850va 

I did some googling and found it has a peak power output of 520w
But when I moved into the new house I bought a Ubiquiti Dream Machine SE - and run wifi access points with PoE plus security cameras
And I had that on the UPS too

So basically the UPS was being asked for more power than it could output, and the server was restarting

If anyone else finds this thread with similar issues - DEFINITELY check your PSU and general power supply