rsync: how to copy file that is not permissible

[nugroho2]

I have run incremental backup using rsync successfully after reading from one site but I could not copy many system files because "permission denied" etc. So I just exclude the folders through the excluded files.
Does this mean that rsync has that limitation? I had run as superuser.
I have read the manual, but still could not find the way to copy all system files using rsync. I have used dd command successfully to do that.

[sjau]

not all files really exist... e.g. /proc just appears but they are not true files...

[nugroho2]

Thanks for the fast reply.

My code is something like this:

$RSYNC \
-av --delete --delete-excluded \
--exclude-from="$EXCLUDES" \
/lib/ $SNAPSHOT/lib ;

and the failure is mostly caused by chgrp and chown, like this:

rsync: chgrp "/media/ACERONE/lib/modules/2.6.23.9lw/usb" failed: Operation not permitted (1)
rsync: chgrp "/media/ACERONE/lib/modules/2.6.23.9lw/usb/media" failed: Operation not permitted (1)
rsync: chown "/media/ACERONE/lib/rtkaio" failed: Operation not permitted (1)
rsync: chown "/media/ACERONE/lib/security" failed: Operation not permitted (1)
rsync: chown "/media/ACERONE/lib/security/pam_filter" failed: Operation not permitted (1)

How do you work around the problem?

[sjau]

what filesystem is the ACERONE?

[nugroho2]

Linpus, based on Fedora 8.

[sjau]

but what filesystem is in place there?