You are trying to install grub on /dev/md121, which is a raid device. To do this, the underlying disks must have a bios_grub partition if they use GPT.
It is trying to install to /dev/md121 because you asked it to in the configure screen. If this is not what you intended, you should uncheck that drive as I suggested before. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1065987 Title: error: embedding is not possible, but this is required for RAID and LVM install. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1065987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
