I'm trying to create a RAID 5 array which will contain the Ubuntu installation itself.
I tried this partition scheme:
2.0 TB for / 6.0 GB for swap
This was as per the instructions provided by Ubuntu.
Ubuntu installed successfully until the GRUB step at which it failed with an error that embedding is not supported without a /boot partition (Sorry, I lost the original error).
tl;dr What kind of partition scheme is typically used for bootable softRAID 5?