I've been dealing with an issue for a couple months where the system will crash/shutdown with little indication of a specific issue. I have the BIOS set to turn the system back on after a power loss so the system comes back up and I can see in the Unraid interface that it wants to do a parity check due to an unclean shutdown. The time between crashes is extremely variable. Sometimes the system will be fine for a month and other times barely 24 hours before a crash. I have the syslog set to mirror to a share so I have attached that as well as the diagnostics zip. The latest crash and restart was approximately an hour before posting this so what I have of the syslog from mirroring is limited to the past two days. Specs and things I have already done are below. I've have been running Unraid for a while now and have never seen an issue like this before so I am really at a loss. For next steps I was thinking replace the motherboard. Are there other steps that might be helpful before that though? Are there any specific things that cause Unraid to completely crash like this? I'd sincerely appreciate any help anyone has to offer as I am pretty distressed by this now.

Specs

• Intel i7-8700, 32 GB DDR4 RAM, ASUS PRIME B360M-A motherboard

• 3 HGST HC520 12 TB HDDs, 1 512 GB NVME cache drive, 2 512 GB SSD cache drives

• Unraid 7.1.4 (crashes were also happening on 7.1.2)

• Plugins: Appdata Backup, CA Auto Update Applications, CA Backup / Restore Appdata, CA Cleanup Appdata, Community Applications, Compose Manager, Dynamix System Buttons, Dynamix System Information, Dynamix System Statistics, Dynamix System Temperature, Fix Common Problems, Intel GPU TOP, Theme Engine, Tips and Tweaks, Unassigned Devices, Unassigned Devices Plus, Unassigned Devices Preclear, Unraid Connect, User Scripts

Troubleshooting Steps

• Replaced 450 watt power supply with a new 650 watt power supply

• Replaced flash drive with new 64 GB Samsung Bar flash drive

• Removed SATA power cable extensions I received with the 12TB drives for the 3.3V issue and replaced with a power supply cable that has the 3.3V line removed

• Move the 3 12TB hard drives from using the motherboard SATA ports to a LSI 9207-8i card

centralplexus-diagnostics-20251014-2219.zip syslog-centralplexus.log

Server shutting down/restarting by itself is almost always a hardware problem, 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.

1 hour ago, JorgeB said:

Server shutting down/restarting by itself is almost always a hardware problem, 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.

Is that something a memory test would normally catch? One thing I forgot to include on my list was I did briefly run the Unraid memory test. I can't recall how many passes but I know no errors were found. I could let that run for more passes. Since the crashes don't occur at any predictable interval, I would either need to use a memory test or replace all the RAM. I'm fine replacing the RAM, I'd just prefer to try and have some way of clearly identifying the issue if possible. Do you think a RAM issue is more likely than a motherboard issue?

46 minutes ago, halszkaraptor said:

Is that something a memory test would normally catch?

Memtest is only definitive if it shows errors, hence my suggestion.

On 10/15/2025 at 5:34 AM, JorgeB said:

Memtest is only definitive if it shows errors, hence my suggestion.

Replaced all the RAM on October 17th and was running fine until today when the server had another random restart. Last thing in syslog before the restart was just some Fix Common Problems lines, again nothing pointing to an obvious issue. For next steps, would you recommend replacing the motherboard?

If it's not the RAM, my next suspects would be the PSU, board or CPU, in no particular order, I would start with what's easier to replace.