sb_ifree and sb_fdblocks are unequal

[Chris Pearson <kermit4@xxxxxxxxx>]

I have the same problem as posted in:
http://oss.sgi.com/archives/xfs/2006-02/msg00091.html

using xfsprogs-2.9.3  in linux  2.4.29

after running xfs_repair on a read-only mounted root filesystem, xfs_check
still shows errors:                                    
                                                                                
                                             
# ./xfs_check.sh -f /dev/md1
sb_ifree 993009, counted 993008
sb_fdblocks 3119630, counted 3119633


# ./xfs_info.sh /                                                               
                                                                                
      
meta-data=/                      isize=256    agcount=56, agsize=1048576
blks
         =                       sectsz=512  
data     =                       bsize=4096   blocks=58587014, imaxpct=25
         =                       sunit=0      swidth=0 blks, unwritten=0
naming   =version 2              bsize=4096  
log      =internal               bsize=4096   blocks=2382, version=1
         =                       sectsz=512   sunit=0 blks
realtime =none                   extsz=65536  blocks=0, rtextents=0


It's possible, even likely, I had corruption due to a power outtage and
Seagate ATAPI drives that had write caching enabled by default.