Hi Robbert,
can somebody give me some good tips in backingup a whole server ? Cause as far as I'm concerned the cobalt way is not really reliable restoring takes a long time and fails to often I find.
Build a Linux box from some (spare) hardware, invest in some large disks and install rsync (http://rsync.samba.org). You can do this securely with openssh (http://www.openssh.com) and passwordless login.
The html man page on http://rsync.samba.org contains enough pointers to get you started.
HTH... Nico