[root@tools 5.5]# du -h
4.0K    ./addons
4.0K    ./centosplus
3.7G    ./os/i386/CentOS
9.2M    ./os/i386/isolinux
14M     ./os/i386/repodata
9.4M    ./os/i386/images/xen
9.0M    ./os/i386/images/pxeboot
187M    ./os/i386/images
16M     ./os/i386/NOTES
4.0G    ./os/i386
4.3G    ./os/x86_64/CentOS
9.8M    ./os/x86_64/isolinux
17M     ./os/x86_64/repodata
9.7M    ./os/x86_64/images/xen
9.6M    ./os/x86_64/images/pxeboot
190M    ./os/x86_64/images
16M     ./os/x86_64/NOTES
4.6G    ./os/x86_64
3.2G    ./os/SRPMS
12G     ./os
4.0K    ./fastrack
4.0K    ./updates
4.0K    ./contrib
4.0K    ./extras
12G     .