I am trying to install Ubuntu Server 18.04 on a pair of 128GB SSDs in RAID1. I followed the "advanced installation" instructions on the Ubuntu help site: https://help.ubuntu.com/lts/serverguide/advanced-installation.html
It seems to have gone well in that when I boot with Gparted I can see the RAID volume and it looks like I expect it to (two drives two partitions each), I cannot see the drives in BIOS (and the installer said that in completed successfully).
Based on other threads, (such as How to install Ubuntu 14.04/16.04 64-bit with a dual-boot RAID 1 partition on an UEFI/GPT system? ) I understand that there needs to be a boot partition, but I thought that was the point of the "boot flag" option that I picked for the partitions that I want to install on. Since the instructions tell me create a new partition table and explicitly tell me to make swap and install partitions, I did not manually create a boot partition prior to creating the swap partition. Because if I was supposed to make a boot partition, they would have told me to make a partition of a few hundred Mb after creating the partition table and before creating the swap partition, right?
Is there something missing from the instructions or am I missing something? I am going to destroy my RAID volume and restart the installation, doing what I just suggested and will report back. But the documentation seems so thorough, could that really have been left out?