setup btrfs

gistfile1.txt

https://btrfs.wiki.kernel.org/index.php/Getting_started
https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices

% echo 'deb http://backports.debian.org/debian-backports squeeze-backports main' > /etc/apt/sources.list.d/backports.list
% sudo apt-get update
% sudo apt-get -t squeeze-backports install linux-image-2.6-amd64
% sudo apt-get install btrfs-tools
% sudo /sbin/shurdown -r now
% sudo mkfs.btrfs -m raid0 /dev/sdb /dev/sdc

WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL
WARNING! - see http://btrfs.wiki.kernel.org before using

adding device /dev/sdc id 2
fs created label (null) on /dev/sdb
        nodesize 4096 leafsize 4096 sectorsize 4096 size 1.82TB
        Btrfs Btrfs v0.19
% sudo mount /dev/sdb /mnt
% sudo btrfs filesystem show
failed to read /dev/sr0
Label: none  uuid: 33e1da3e-d475-42d3-a674-3806673864c8
        Total devices 2 FS bytes used 28.00KB
        devid    2 size 931.51GB used 2.01GB path /dev/sdc
        devid    1 size 931.51GB used 2.03GB path /dev/sdb

Btrfs Btrfs v0.19
% echo "UUID=33e1da3e-d475-42d3-a674-3806673864c8 /mnt  btrfs   defaults        0       0" >> /etc/fstab