This is the log from running grub-install -v /dev/sda
It doesn't really give me any clues but maybe somebody else will spot what's wrong. ** Attachment added: "grub-install.log" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1759877/+attachment/5096718/+files/grub-install.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1759877 Title: grub-pc fails to upgrade with raid disks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1759877/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs