Backing up my system

[Christopher J.Utley]

I've just inherrited a FreeBSD system with an internal RAID setup.  
There is about 100GB of system and application data.  I am looking for 
a way to back-up a snapshot of the entire filesystem so that I could 
restore everything in the event the box were to blow up or something.  
I would want to replicate the partitioning scheme, but not necessarily 
the RAID configuration.

I'm already backing up my application data nightly, but what I really 
want is a weekly copy of the whole thing, so I wouldn't have to 
reinstall the entire system and data in order to get up and running 
again.

Any suggestions on how to do this most effectively would be appreciated.

Thanks in advance.