cp command - problem with sparse

[RE]

Hi there,

I have files on my HD that contain large amounts of 
zeroes and I want to convert them into sparse files.  I 
already tried the GNU fileutils with their cp command.  
They say that it converts standard files into sparse 
files by using the command 
"cp --sparse=always c:\test.cfg c:\test2.cfg"

Everything works fine with that cp command, except the 
fact that I do not get a sparse file.  Even when I copy 
a sparse file, the sparse attribute is no longer 
present in the copy an the occupied space on my HD is 
the same as with the original file.

What am I doing wrong?

I tried already different PCs with NTFS (OS = Win2k 
SP4)

Your help and assistance would be appreciated very 
much.

Thanks and regards,


Rolf