Comment 25 for bug 1241589

so... the stable Ubuntu release cannot be installed on systems with more than one hard drive, or hard drives formatted with btrfs (in this case both are true).

someone could probably safely decide may be important for modern systems...

sure, tear your (notebook factor) hardware apart (including the ones needed to install to), maybe use a single MBR partition to install Ubuntu... or maybe just use a distribution with a bootable installer instead.