btrfs-show - scan the /dev directory for btrfs partitions and print results.
is used to scan the /dev directory for btrfs partitions and display brief
information such as lable, uuid, etc of each btrfs partition.
is part of btrfs-progs. Btrfs is currently under heavy development,
and not suitable for any uses other than benchmarking and review.
Please refer to the btrfs wiki
http://btrfs.wiki.kernel.org for further details.