Without rebooting I followed directions at https://askubuntu.com/questions/83037/how-do-i-reinstall-grub2, mounted / and /boot/efi:
root@ubuntu:~# df Filesystem 1K-blocks Used Available Use% Mounted on udev 16421252 0 16421252 0% /dev tmpfs 3287460 9792 3277668 1% /run /dev/sdc 1550400 1550400 0 100% /cdrom /dev/loop0 1496320 1496320 0 100% /rofs aufs 16437292 2260244 14177048 14% / tmpfs 16437292 18012 16419280 1% /dev/shm tmpfs 5120 4 5116 1% /run/lock tmpfs 16437292 0 16437292 0% /sys/fs/cgroup tmpfs 16437292 524 16436768 1% /tmp tmpfs 3287460 84 3287376 1% /run/user/999 /dev/sdb2 50264772 53072 47635316 1% /mnt /dev/md0 523248 3496 519752 1% /mnt/boot/efi root@ubuntu:~# ls /mnt/boot/efi EFI root@ubuntu:~# ls /mnt/boot/efi/EFI/ Dell ubuntu root@ubuntu:~# grub-install --root-directory=/mnt /dev/sdb Installing for i386-pc platform. grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible. grub-install: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged.. grub-install: error: will not proceed with blocklists. root@ubuntu:~# grub-install --force --root-directory=/mnt /dev/sdb Installing for i386-pc platform. grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible. grub-install: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged.. Installation finished. No error reported. root@ubuntu:~# update-grub /usr/sbin/grub-probe: error: failed to get canonical path of `aufs'. root@ubuntu:~# Tried to boot from BIOS (UEFI boot manager) selecting "integrated RAID Controller 1: ubuntu" and got a "GRUB>" prompt. Seems like no way to boot from second drive via the UEFI BIOS. Swapped drives with same result. or similar hoping -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1721317 Title: graphical installer crashed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1721317/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
