Reinstalling from the same ISO, I used guided partitioning to completely wipe the root partition and reinstall the system. At the same time, I also told it to mount the array.
After installation, my array is mounted and I see this in /etc/fstab:
# /media/raid was on /dev/md0 during installation
UUID=c3cc60a8-e441-4c68-a59d-ee6bacaf1e34 /media/raid ext4 defaults 0 2
Sure enough, the array is now assembled as /dev/md0. Of course, I shouldn't have to do that when I told mdadm that I wanted the array to be /dev/md0 in the first place.
Reinstalling from the same ISO, I used guided partitioning to completely wipe the root partition and reinstall the system. At the same time, I also told it to mount the array.
After installation, my array is mounted and I see this in /etc/fstab:
# /media/raid was on /dev/md0 during installation e441-4c68- a59d-ee6bacaf1e 34 /media/raid ext4 defaults 0 2
UUID=c3cc60a8-
Sure enough, the array is now assembled as /dev/md0. Of course, I shouldn't have to do that when I told mdadm that I wanted the array to be /dev/md0 in the first place.