Re: Differences in mkfs.xfs and xfs_info output.

[Jan Derfinak <ja@xxxxxxxxxxxx>]

On Sat, 16 Feb 2008, David Chinner wrote:

> had time. The patch below should fix the problem - mkfs.xfs is writing
> the features2 field to the wrong location in the superblock, and
> this patch detects and corrects it. You'll probably see the output:

I would like to ask if correcting the feature2 field can lead to this
message?:
# xfs_check /dev/system/mnt
sb_fdblocks 190009, counted 191033
sb_fdblocks 190009, aggregate AGF count 191033

"local" is copy (dd) of other corrected FS
# xfs_check local
sb_fdblocks 163441, counted 165489
sb_fdblocks 163441, aggregate AGF count 165489
# xfs_repair -v local
Phase 1 - find and verify superblock...
        - block cache size set to 96240 entries
Phase 2 - using internal log
        - zero log...
zero_log: head block 120967 tail block 120967
        - 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
        - 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
Phase 5 - rebuild AG headers and trees...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - reset superblock...
Phase 6 - check inode connectivity...
        - resetting contents of realtime bitmap and summary inodes
        - traversing filesystem ...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - traversal finished ...
        - moving disconnected inodes to lost+found ...
Phase 7 - verify and correct link counts...

        XFS_REPAIR Summary    Sat Feb 16 23:31:16 2008

Phase           Start           End             Duration
Phase 1:        02/16 23:31:10  02/16 23:31:10
Phase 2:        02/16 23:31:10  02/16 23:31:13  3 seconds
Phase 3:        02/16 23:31:13  02/16 23:31:15  2 seconds
Phase 4:        02/16 23:31:15  02/16 23:31:16  1 second
Phase 5:        02/16 23:31:16  02/16 23:31:16
Phase 6:        02/16 23:31:16  02/16 23:31:16
Phase 7:        02/16 23:31:16  02/16 23:31:16

Total run time: 6 seconds
done
# xfs_check local
# xfs_info /usr/local/
meta-data=/dev/mapper/system-local isize=256    agcount=4, agsize=131072
blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=524288, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096  
log      =internal               bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0


I cannot confirm that wrong fdblocks count was not there before correction. I
checked FS's only after correction.


Cheers,

jan

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