Setting up btrfs - questions

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http://www.linuxquestions.org – Greetings! I've heard a lot about the new btrfs, so I decided to give it a go. I'm trying to setup arch linux on a btrfs as the main file system. I've managed to get the system running, but I have some questions about btrfs. It seems so different from anything I've tried so far. :scratch: Subvolumes: I am confused. With filesystems like ext4 you had to create a new partition on the HDD, format it with mkfs.ext4, and mount it by using appropriate entries in fstab. I would follow this path with btrfs (i.e. create a btrfs filesystem on each partition, and have it mounted), but I read somewhere (HowTos)