No, actually there seem to be 2 EFI partitions (sda2 and sda3). sdb is just an external disk and sdc the Live USB itself.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782029 Title: Fatal error: Unable to install GRUB in /dev/sda during Ubuntu 18.04 install (erasing previous incomplete install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1782029/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs