cp and big files

[nordi]

Hi,

I have a little problem using 'cp' for copying files.

What I'm trying to do is the following:
cp /dev/hda12 /backup/img_hda12 &
It starts copying, but stops when img_hda12 has reached
a size of 2147483645 bytes, which looks to me like
2^31 . Is there a way to get this file copied with cp?
I have enough disk space (8GB), so that's not the
problem.

my system:
SuSE Linux 7.0  kernel 2.2.16
/backup is a ReiserFS partition (EIDE)


thanks for your help
nordi