It’s just yulistic!

Linux

Purpose Let’s make a root(/) partition except /boot directory be btrfs. btrfs supports a copy-on-write functionality. For the reason of excepting /boot partition, the Ubuntu document warns against including Grub into btrfs partition. … As of 11.04, it is possible to use only btrfs file systems with the caveat that grub ‘MUST NOT’ be installed to the boot sector of the btrfs volume containing /boot. (link) As a result, I decided to make the /boot partition be separated from the root(/) partition.