The log files attached don't show any installation on either sda or sdb: Apr 3 09:54:35 ubuntu grub-installer: info: Installing grub on '/dev/nvme0n1'
What exactly do you see that tells you it's installing to sda? ** Changed in: ubiquity (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926865 Title: During OS install, GRUB tries installing on sda even when it should install on sdb To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1926865/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs