For a full 32GB at the max sustained speed(275MB/s), 32ish hours to transfer a full amount, 36 if you assume 250MB/s the whole run. Probably optimistic. CPU overhead could slow that down in a rebuild. That said in a RAID5 of 5 disks, that is a transfer speed of about 1GB/s if you assume not getting close to the max transfer rate. For a small business or home NAS that would be plenty unless you are running greater than 10GiBit ethernet.
On top of the thermal paste idea, try doing a ram test. Could also try adding “nvidia_drm.modeset=0” to your kernel commandline or add “options nvidia-drm modeset=0” in /etc/modprobe.d/nvidia.conf. It might have that set to 1 somewhere.
There may be more in the logs as well. Are you able to test in windows? Maybe the gpu is failing as well.
I have seen this as well with a couple games(FarCry 4/5). Also Arch/Plasma 6 with Nvidia 4080. I don’t know if it is driver, kwin or dxvk related or something else though.
I haven’t figured out how to resolve it either.
I can’t tell from that output if you are using wayland or X11. If it is wayland I’d try X11 as the drivers before 555(?) don’t work as well and some compositors may be more unstable with the nvidia drivers.
I’d also try checking the logs as well. ‘journalctl -b -1 -xe’ to show the prior boot.
These is my only other suggestions.
If I am understanding that output, your bios is 5 years old and there are a LOT of updates since. If that is correct I’d try updating as bios updates fix things like PCIe compatibility which were released after that date.
You probably just had a program(s) use a lot of ram and that pushed some processes to swap. When the system needs it, it will be moved back. I’d +1 on setting up zram. Can be setup easily on most distros.
Did you happen to enable Bluetooth LE-Audio mode for the Headphones in an app? If so you need to turn it off.