XFS Use% mismatch!

["Jacky Kim" <jcy_2008@xxxxxxx>]

I use the follow XFS cmd_tars under kernel 2.6.7:
  acl-2.2.27.src.tar.gz
  attr-2.4.19.src.tar.gz
  xfsprogs-2.6.25.src.tar.gz
  dmapi-2.2.1.src.tar.gz
  xfsdump-2.2.25.src.tar.gz

# uname -a
Linux fc2 2.6.7 #1 Mon Dec 27 10:44:16 CST 2004 i686 GNU/Linux

# cat /proc/mdstat 
Personalities : [linear] [raid0] [raid1] [raid5] 
md0 : active raid5 sdd[4] sdc[3] sdb[2] sda[1]
      732595392 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]

# mount
/dev/md/0 on /vol type xfs (rw,noatime,nodiratime,nouuid,usrquota)

After some days, I found some mismatch ploblem:

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/md/0             699G   93G  607G  14% /vol        
                             ~~~        ~~~
# df -i
Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/dev/md/0            732595328     487 732594841    1% /vol
                                   ~~~             ~~~
But when I remount it, and it seems ok:

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/md/0             699G  2.0M  699G   1% /vol        
                             ~~~        ~~~
# df -i
Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/dev/md/0            732595328       8 732595320    1% /vol
                                   ~~~             ~~~

Best Regards!

Jacky Kim
.