這是本文件的舊版！
Btrfs
Snapshot
btrfs send /mnt/btr_backup/data.20150101 | btrfs receive /mnt/btr_pool/ btrfs subvolume snapshot /mnt/btr_pool/data.20150101 /mnt/btr_pool/data btrfs subvolume delete /mnt/btr_pool/data.20150101
Scrub
btrfs scrub start /
Find files with csum error
find /mount-point -type f -exec cp {} /dev/null \;
Device
btrfs fi show btrfs device add /dev/xxx / btrfs balance start -dconvert=raid1 -mconvert=raid1 /
http://www.moocowproductions.org/2014/12/04/fully-online-raid1-to-raid10-migration-using-btrfs/
