Over the past three days I've been experiencing hard lockups on my server running Unraid 7.2.3. The only way out of which is to power down or reboot - the server disappears off the network and is unresponsive to keyboard input (keyboard lights go out).

I've ruled out Immich (by disabling its Dockers), WireGuard (by disabling the tunnel), RAM (by swapping out for spare, known working sticks). Ipvlan is already set.

I'm at a loss. Short of swapping out all of the hardware bar the HDD's I don't know what to do to even troubleshoot the issue. I've been running Unraid servers for 12 years without anything close to an issue like this. Do my diagnostics files reveal anything to anyone?

crookserver-diagnostics-20251221-2210.zip

I would mark this as resolved, as changing the BIOS settings as suggested in the linked post has increased stability, but not eliminated the lockups entirely. I have an oddly specific issue now where the server will lockup every time my son attempts to remotely access and play anything on his Plex account. Does this sound familiar to anyone?
Outside of this specific scenario, the server has been running without issue since changing the suggested BIOS settings.