[CentOS] Off-topic: strange problem with file size

Hi

I'm having a curious problem with some files. The account has 77GB of 
data[1], but there some files with more than 100GB[2], in fact, two of 
then have more than 200GB[3].

The OS is Opensuse 10.2 x86_64.

Has anyone seem something like this? How can I inspect more closely what 
  is going on?

Thanks

Marcelo



[1]
maryland:/maryland2 # du -sh alireza/
77G     alireza/
maryland:/maryland2 #

[2]
maryland:~ # find /maryland2/alireza/ -size +100G -print
/maryland2/alireza/Restart/1to1-2/events-cfluid-rem-add-pasi/test.rsi
/maryland2/alireza/Restart/1to1-2/lqfCyclic/Restart/a.rsi
/maryland2/alireza/Restart/1to1-2/lqfCyclic/a.rsi
maryland:~ #

[3]
maryland:~ # ls -lh 
/maryland2/alireza/Restart/1to1-2/lqfCyclic/Restart/a.rsi
-rw-r--r-- 1 alireza cdrom 223G Jul 13 09:56 
/maryland2/alireza/Restart/1to1-2/lqfCyclic/Restart/a.rsi
maryland:~ #
maryland:~ #
maryland:~ # ls -lh /maryland2/alireza/Restart/1to1-2/lqfCyclic/a.rsi
-rw-r--r-- 1 alireza cdrom 223G Jul 13 09:56 
/maryland2/alireza/Restart/1to1-2/lqfCyclic/a.rsi
maryland:~ #