[CentOS] 4 X 500 gb drives - best software raid config for a backup server?

[dnk]

Hi there,

I am currently setting up a server that will house my backups (simply  
using rsync).

This system has 4 X 500 gb drives and I am looking to raid for max  
drive space and data safety. Performance is not so much a concern.

My experience with software raids in nil, so some of these may seem  
like pretty dumb questions.

I was thinking a raid 1 is probably sufficient.

Would it be best to raid 1 two drives each and LVM them together?

My next question would be about how to do this as I have never done a  
linux software raid.

D