====== BTRFS RAID ======

===== Contruire un raid5 =====

mkfs.btrfs -d raid5 -m raid5 -O raid56 /dev/RAID/MP3-1 /dev/RAID/MP3-2 /dev/RAID/MP3-3 /dev/RAID/MP3-4

===== voir les disques =====

Occupation des disques:

    btrfs fi df /home
    
Liste des disques:

    btrfs fi show
    Label: none  uuid: d03af97c-5df3-4653-8a1a-1a055b50f200
        Total devices 1 FS bytes used 35.42GiB
        devid    1 size 40.00GiB used 38.02GiB path /dev/mapper/RAID-VIDEO1
    Label: none  uuid: 233805cd-fbd3-46eb-847f-2a598db8a93a
        Total devices 4 FS bytes used 960.00KiB
        devid    1 size 10.00GiB used 1.12GiB path /dev/mapper/RAID-MP3--1
        devid    2 size 10.00GiB used 1.12GiB path /dev/mapper/RAID-MP3--2
        devid    3 size 10.00GiB used 1.12GiB path /dev/mapper/RAID-MP3--3
        devid    4 size 10.00GiB used 1.12GiB path /dev/mapper/RAID-MP3--4


===== Recovery =====

Remonter le FS défaillant:
   mount -t btrfs -o recovery <device> <mount point>
   
Enlever le disque
    btrfs device delete missing <mount point>
    
Puis refaire le raid
    btrfs balance start <mount point>

Ou remplacer le disque:
    btrfs replace start -r <device source> <device dest> <mount point>