Update:
xfs_repair has fixed the problem:root@ashdbtrk-s008-02:/home/wdeviers# xfs_check /dev/vg0/mysql
agf_freeblks 327676, counted 655100 in ag 4
agf_longest 327676, counted 655100 in ag 4
block 12/1 expected type unknown got btbno
block 12/4 expected type unknown got free2
...
block 12/45268 expected type unknown got free2
block 12/45269 expected type unknown got free2
block 12/45270 expected type unknown got free2
block 12/45271 expected type unknown got free2
block 12/45272 expected type unknown got free2
block 12/45273 expected type unknown got free2
block 12/45274 expected type unknown got free2
block 12/45275 expected type unknown got free2
root@ashdbtrk-s008-02:/home/wdeviers# xfs_repair /dev/vg0/mysql
Phase 1 - find and verify superblock...
Phase 2 - using internal log
- zero log...
- scan filesystem freespace and inode maps...
primary/secondary superblock 4 conflict - AG superblock geometry info conflicts with filesystem geometry
bad sequence # 12 for agf 4
bad length 327680 for agf 4, should be 655104
bad sequence # 12 for agi 4
bad length # 327680 for agi 4, should be 655104
reset bad sb for ag 4
reset bad agf for ag 4
reset bad agi for ag 4
sb_fdblocks 28836636, counted 28509212
- 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
- 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
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