bmxboy@bmxboy-virtual-machine:/$ sudo mount -t btrfs /dev/vg1/volume_1 /mnt/ds001 -o ro
        mount: /mnt/ds001: wrong fs type, bad option, bad superblock on /dev/mapper/vg1-volume_1, missing codepage or helper program, or other error.
    bmxboy@bmxboy-virtual-machine:/$ sudo mdadm -D /dev/md2
    /dev/md2:
               Version : 1.2
         Creation Time : Thu Mar 28 20:24:15 2019
            Raid Level : raid6
            Array Size : 23403556352 (22319.37 GiB 23965.24 GB)
         Used Dev Size : 2925444544 (2789.92 GiB 2995.66 GB)
          Raid Devices : 10
         Total Devices : 10
           Persistence : Superblock is persistent

           Update Time : Fri Apr 19 08:55:24 2019
                 State : clean
        Active Devices : 10
       Working Devices : 10
        Failed Devices : 0
         Spare Devices : 0

                Layout : left-symmetric
            Chunk Size : 64K

    Consistency Policy : resync

                  Name : DS001:2
                  UUID : 356ff063:76450548:c57674b6:69223636
                Events : 29235

        Number   Major   Minor   RaidDevice State
           0       8      131        0      active sync   /dev/sdi3
           1       8      115        1      active sync   /dev/sdh3
           2       8       67        2      active sync   /dev/sde3
           3       8       83        3      active sync   /dev/sdf3
           4       8       51        4      active sync   /dev/sdd3
           8       8       99        5      active sync   /dev/sdg3
           6       8      147        6      active sync   /dev/sdj3
          12       8       19        7      active sync   /dev/sdb3
          11       8      163        8      active sync   /dev/sdk3
          10       8       35        9      active sync   /dev/sdc3

        bmxboy@bmxboy-virtual-machine:/$ dmesg | grep BTRFS
        [   17.026125] BTRFS: device label 2019.03.28-12:24:35 v23739 devid 1 transid 6011 /dev/dm-1
        [  168.013852] BTRFS info (device dm-1): using free space tree
        [  168.013855] BTRFS info (device dm-1): has skinny extents
        [  168.127156] BTRFS error (device dm-1): parent transid verify failed on 887020683264 wanted 6011 found 6270
        [  168.133110] BTRFS error (device dm-1): parent transid verify failed on 887020683264 wanted 6011 found 6270
        [  168.133118] BTRFS warning (device dm-1): failed to read tree root
        [  168.151448] BTRFS error (device dm-1): open_ctree failed
        [ 8686.922437] BTRFS warning (device dm-1): 'recovery' is deprecated, use 'usebackuproot' instead
        [ 8686.922439] BTRFS info (device dm-1): trying to use backup root at mount time
        [ 8686.922441] BTRFS info (device dm-1): disabling free space tree
        [ 8686.922444] BTRFS error (device dm-1): cannot disable free space tree
        [ 8686.923395] BTRFS error (device dm-1): open_ctree failed
        [ 9761.164452] BTRFS info (device dm-1): disabling free space tree
        [ 9761.164455] BTRFS error (device dm-1): cannot disable free space tree
        [ 9761.165254] BTRFS error (device dm-1): open_ctree failed
        [14237.853328] BTRFS info (device dm-1): unrecognized mount option '0'
        [14237.853528] BTRFS error (device dm-1): open_ctree failed


bmxboy@bmxboy-virtual-machine:/$ sudo btrfs fi  show
Label: '2019.03.28-12:24:35 v23739'  uuid: 90877621-a602-4915-914c-70eada4c3428
        Total devices 1 FS bytes used 14.68TiB
        devid    1 size 19.07TiB used 15.50TiB path /dev/mapper/vg1-volume_1