xfsprogs/xfsprogs-2.9.6/repair# ./xfs_repair -M /dev/mapper/backupdata-backup
Phase 1 - find and verify superblock...
Phase 2 - using internal log
        - zero log...
        - scan filesystem freespace and inode maps...
        - found root inode chunk
Phase 3 - for each AG...
        - scan and clear agi unlinked lists...
        - process known inodes and perform inode discovery...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - agno = 4
        - agno = 5
data fork in ino 2694089321 claims free block 1578224453
data fork in ino 2694089321 claims free block 1578224454
data fork in ino 2694089321 claims free block 1578224455
data fork in ino 2694089321 claims free block 1578224456
data fork in ino 2694089321 claims free block 1578224457
data fork in ino 2694089321 claims free block 1578224458
data fork in ino 2694089321 claims free block 1578224459
data fork in ino 2694089321 claims free block 1578224460
data fork in ino 2694089321 claims free block 1578224461
        - agno = 6
        - agno = 7
        - agno = 8
        - agno = 9
        - agno = 10
        - agno = 11
        - agno = 12
        - agno = 13
        - agno = 14
        - agno = 15
        - agno = 16
        - agno = 17
        - agno = 18
        - agno = 19
        - agno = 20
        - agno = 21
        - agno = 22
        - agno = 23
        - agno = 24
        - agno = 25
        - agno = 26
        - agno = 27
        - agno = 28
        - agno = 29
        - agno = 30
        - agno = 31
        - agno = 32
        - agno = 33
        - agno = 34
        - agno = 35
        - agno = 36
        - agno = 37
        - agno = 38
        - agno = 39
        - agno = 40
        - agno = 41
        - agno = 42
        - agno = 43
        - agno = 44
        - agno = 45
        - agno = 46
        - agno = 47
        - agno = 48
        - process newly discovered inodes...
Phase 4 - check for duplicate blocks...
        - setting up duplicate extent list...
        - check for inodes claiming duplicate blocks...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - agno = 4
        - agno = 5
        - agno = 6
        - agno = 7
        - agno = 8
        - agno = 9
        - agno = 10
        - agno = 11
        - agno = 12
        - agno = 13
        - agno = 14
        - agno = 15
        - agno = 16
        - agno = 17
        - agno = 18
        - agno = 19
        - agno = 20
        - agno = 21
        - agno = 22
        - agno = 23
        - agno = 24
        - agno = 25
        - agno = 26
        - agno = 27
        - agno = 28
        - agno = 29
        - agno = 30
        - agno = 31
        - agno = 32
        - agno = 33
        - agno = 34
        - agno = 35
        - agno = 36
        - agno = 37
        - agno = 38
        - agno = 39
        - agno = 40
        - agno = 41
        - agno = 42
        - agno = 43
        - agno = 44
        - agno = 45
        - agno = 46
        - agno = 47
        - agno = 48
Phase 5 - rebuild AG headers and trees...
        - reset superblock...
Phase 6 - check inode connectivity...
        - resetting contents of realtime bitmap and summary inodes
        - traversing filesystem ...
        - traversal finished ...
        - moving disconnected inodes to lost+found ...
Phase 7 - verify and correct link counts...
done