I have a headless Raspberry Pi 4 (4GB) running 64-bit Ubuntu Server as my home NAS server. It drives 4 x 2TB USB3 drives in a ZFS RAIDZ, connected via a USB3 hub that also powers the Pi.
It has been running since about May, and has got noticeably more stable as 20.04 on the 64-bit Pi has matured. The only small gotcha I have noticed is that there are no precompiled ZFS binaries and the machine rebuilds all the ZFS modules every time I get a new kernel version.
I would like to install the HWE stack for 20.04.2 on the machine and thereby get kernel 5.8. However there do not seem to be any RasPi kernel packages. Is that right? The generic ARM HWE kernel does not work; it installs fine but the Pi simply reboots into the latest 5.4 kernel.
sudo apt install linux-generic-hwe-20.04
work?/boot/firmware/
) and the machine just rebooted into the standard kernel 5.4. Apparently Ubuntu on Pis uses a special, tweaked kernel with Pi support.