Let me preface with I am a network guy; I know enough about OS / NAS / Servers to be dangerous.

Had my server for a few years. In that time I have gone through about 4 different hard drives due to SMART errors. Recently back in November I replaced the Parity drive with a Seagate Iron Wolf. Its now throwing SMART errors too. Tried to run SMART extended diagnostics but its hanging on Last SMART test result, just a spinning circle and the button is greyed out. Eventually it errored with "Interrupted (host reset)". Set my spin down to never will try again. Keep getting "READ FPDMA QUEUED" in the error log. I have replaced the SATA cables three separate times.

Chronic lock ups. The UI will stop responding, or I get a 500 error. Ignores reboot commands from CLI. Went down that rabbit hole searching how to fix it. Nothing works, I just have to go hit the power button and force it off then it behaves for a while. Disabling Docker seemed to help, recently re-enabled it but we will see how long it goes.

I got a drive disabled, tried reformatting but the rebuild takes forever, like 160+ days. Stopped that, and have quit trying to get it to work.

Motherboard doesn't always remember the boot drive. Sometimes on a reboot/power off it will "forget" the boot drive is there until I reseat then boot into BIOS and put it back into the top of the stack. Also the mobo has started to hang on boot, it takes up to 2 minutes for it to finally display the splash screen to boot Unraid. I cant get into BIOS until that time either.

100% CPU, 3/4 cores will show pegged out but when I get into the shell with top it shows the system is idle.

I don't even know where to begin with this mess, I am tempted to just replace the mobo/cpu/RAM and start over. Can someone tell me what I am doing wrong here? I am at my wits end.

tower-diagnostics-20260627-1750.zip

Tried Extended SMART test again after setting spin-down delay to 9 hours. Once again got Interrupted (host reset)

GUI has started to become unresponsive again. It has something to do with docker, as it started misbehaving a couple hours after starting it. Now I can't even get into the settings to disable docker and the GUI is starting to load slow.

Parity is logging constant errors, and it has pending sectors, swap both cables with a different disk and post new diags just to confirm.