[PlanetCCRMA] software raid a good idea?

[Chris Howard]

I purchased a second identical SATA drive for my new
system (Dell E510)  The motherboard has ICH7 raid on it.

But from what I read, I can't get that running with FC4.
I'm not sure I have the knowledge to attempt an FC5
install of planetCCRMA at this point.

Should I  
1 - forget raid (mirroring) and just use it as a second drive
2 - wrestle with FC5
3 - go with software raid

?

Are there performance penalties for using either the ICH7 or the
software raid for mirroring?

Chris