I am very new to this and still don;t know very much so please bare with me. I have recently set up Unraid on a diy home server but unfortunately cannot seem to get thing going. I am unable to get my parity sync done as the system keeps rebooting randomly. The random reboots happen even when the the parity sync hasnt been started. As the array consists of 2x 10Tb drives the estimated time to complete this is over 10 hours and the furthest I have gotten was the very first time running the sync and only managed half way. I have checked my psu and ram and everything seems fine. I tried having a look at the syslogs but genuinly have no idea what I;m even looking at to be honest. I am uploading the diagnostics zipfile. If anyone can help me diagnosing the issue I would greatly appreciate it. Any help what so ever would be fantastic.

Thank you in advance.

tower-diagnostics-20260519-2245.zip

Random reboots are almost always a hardware issue, start by running memtest from the boot menu, or because 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.

To add to what @JorgeB said, I've also had unexpected reboots when my power supply was dying and I've also had it happen because the battery in my UPS needed to be replaced.

So I updated the BIOS to be able to run memtest which came back with nice clean RAM. So far the server has been running for almost 24hours with no issues. I assume the BIOS update possibly solved the problem but not sure

Thank you @JorgeB and @WizADSL for your input, I appreciate you taking the time. No doubt I will be back on here in the future when I come across my next issue.

Thanks again.