On Friday and Saturday I tried to improve boot times, but I destroyed the installation in the process. I reinstalled the system on ext4, still using zfs for my data. Booting from ext4 solved my issue, I now boot the system in ~40 seconds instead of 4 minutes.
I did find out, that it was not a "simple" alignment issue like I thought writing the bug report, so I think you can dump this confusing bug report. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1949252 Title: Ubuntu installed with wrong ZFS partition alignment for 4k HDD To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1949252/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs