btrfs repair

btrfs repair

[nurettin]

which commands repair my btrfs filesystem. thank you.


mdadm -D /dev/md2
/dev/md2:
            Version : 1.2
      Creation Time : Tue Mar 10 18:53:32 2020
         Raid Level : linear
         Array Size : 21455548416 (20461.61 GiB 21970.48 GB)
       Raid Devices : 4
      Total Devices : 4
        Persistence : Superblock is persistent

        Update Time : Wed Jul 22 13:20:52 2020
              State : clean
     Active Devices : 4
    Working Devices : 4
     Failed Devices : 0
      Spare Devices : 0

           Rounding : 64K

Consistency Policy : none

               Name : n0:2
               UUID : fb2b1053:b63f9733:6a34de1b:8a5b6fcd
             Events : 54

     Number   Major   Minor   RaidDevice State
        0       8       19        0      active sync   /dev/sdb3
        1       8       35        1      active sync   /dev/sdc3
        2       8       51        2      active sync   /dev/sdd3
        3       8       67        3      active sync   /dev/sde3


root@ubuntu:~# btrfs fi show
Label: '2020.03.10-18:55:12 v23739'  uuid: 
79471a21-005a-4b82-bc30-42357b9f4105
	Total devices 1 FS bytes used 13.85TiB
	devid    1 size 19.98TiB used 14.28TiB path /dev/mapper/vg1-volume_1


root@ubuntu:~# mount /dev/vg1/volume_1 ./btrfs/
mount: /root/btrfs: wrong fs type, bad option, bad superblock on 
/dev/mapper/vg1-volume_1, missing codepage or helper program, or other 
error.

btrfs-find-root /dev/vg1/volume_1

Couldn't setup extent tree
Couldn't setup device tree
Superblock thinks the generation is 239232
Superblock thinks the level is 1
...........................
Well block 4139877171200(gen: 20533 level: 1) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1
Well block 4139850039296(gen: 20532 level: 1) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1
Well block 4085098168320(gen: 20407 level: 1) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1
Well block 4085102346240(gen: 20388 level: 0) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1
Well block 4030345101312(gen: 20292 level: 1) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1
Well block 4030324768768(gen: 20291 level: 1) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1
Well block 4030343970816(gen: 20272 level: 0) seems good, but 
generation/level doesn't match, want gen: 239232 level: 1