When installing to a fake raid, you need to install grub to the whole raid array ( /dev/mapper/pdc_iieajihg ) rather than an individual disk ( /dev/sda ). In addition, you appear to have somehow placed partitions inside of a partition ( /dev/mapper/pdc_iieajihg5 ), which is not valid.
** Changed in: grub-installer (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1475043 Title: raid0 gpt uefi install failed on grub installation. uefi boot problems. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1475043/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs