du vs ls vs df....odd results

[Luca Ferrari]

Hi all,
anybody can explain me what is going on here?

[root at server 34]# pwd
/vol1/sys/34
[root at server 34]# du -hs
131G    .
[root at server 34]# df -H
Filesystem            Size  Used Avail Use% Mounted on
/dev/md2              4.5G  2.3G  2.0G  53% /
/dev/md4               64M  6.1M   54M  11% /boot
none                  131M     0  130M   0% /dev/shm
/dev/md0              6.5G  3.6G  2.6G  58% /vol1
/dev/md1              6.5G  5.2G  1.0G  84% /vol2
[root at server 34]# du -hs * | grep G
131G    stamagaz.dat
[root at server 34]# ls -lh stamagaz.dat
-rwxrwxrwx    1 nobody   users        1.0k lug 30 09:06 stamagaz.dat
[root at server 34]#

The /vol1/sys/34 directory seems to be of 131GB due to the stamagaz.dat file, 
that seems to be only 1 k to ls and df reports that the whole partition is 
about 3,6 GB.....what's wrong here?

Thanks,
Luca