Sometimes grub guesses BIOS disk order incorrectly, using edd=on installer boot option might fix the issue.
See https://bugs.launchpad.net/ubuntu/+source/grub/+bug/8497
Sometimes grub guesses BIOS disk order incorrectly, using edd=on installer boot option might fix the issue.
See https:/ /bugs.launchpad .net/ubuntu/ +source/ grub/+bug/ 8497