/boot/firmware no space left on device

[thomaspries]

@rlaager, I have the following issue with the Ubuntu 22.04 Root on ZFS for Raspberry Pi HOWTO:
I followed your HowTo and it works perfectly well so far, thank you for this. But after some time and some updates , a apt upgrade fails with /boot/firmware: no space left on device. My workaround is quite simple, I multiply the value for BOOT= by 3 to get a larger partition. After the installation I temorarily move the content of /boot/firmware to somewhere else, mkfs.vfat /dev/sdX1, move former content back (there is plenty of space now) and update /etc/fstab to the new UUID of /dev/sdX1. If there ist a better solution for this issue, a hint in the HowTo would be great.

[rlaager]

Can you see what is using all the space? Is this something where it needs to have two copies of everything during an upgrade or similar?

[rlaager]

To be clear, I think the answer here will just be that we need the instructions to specify a bigger partition.

[thomaspries]

Can you see what is using all the space? Is this something where it needs to have two copies of everything during an upgrade or similar?

I have not investigated it to the full extend, but it looks like there is some kind of "backup before replace" mech at work.

To be clear, I think the answer here will just be that we need the instructions to specify a bigger partition.

To increase just the size of the partition (multiply BOOT by 3) was my first attempt, but I always ended up with just 256MB size of /boot/firmware filesystem. I had to expand the filesystem (reformat was the fastes solution for me) to get a larger filesystem.