The Logic Off Topic list

I have a G5 dual 2.0ghz 4 GBram and currently two hds 1 250Gb
maxtor that everything is on and another that all my loops
ands anyhting that has to do with audio except the application
itself mainly libraries . I saw a product that lets you mount up
to three more hd in your mac and it was talking about setting up
as a raid conf. My question is would a raid set up help
perfromance   and what raid conf is best. I saw something about
raid 1 being pretty useful. I would like to have one hard drive
mirror my system hd, then the other two set up to work together. I
dont know much about it as you can gather so any help is
appreciated