[CentOS] RAID advice? and KVM advice?

Hello All,

In the not too distant future I will be commissioning a new CentOS  
(5.4?) box with 4 identical SATA drives. I'd like to set them up as  
RAID 1+0 for speed and redundancy. I've read the RHEL 5 deployment  
guide on raid setup and it seems to cover the basics of software raid  
pretty well, but doesn't cover 1+0. Does anyone have a reference for  
that kind of configuration?

I'd also like to have two virtual domains, one for CentOS and one for  
Debian. any suggestions for setup docs for that kind of arrangement?

TIA.

Dave


-- 
When addiction becomes commonplace in a society, people become  
addicted not only to alcohol and drugs, but to a thousand other  
destructive pursuits: money, power, dysfunctional relationships, or  
video games. A social perspective on addiction does not deny  
individual differences in vulnerability to addiction, but it removes  
them from the foreground of attention, because social determinants are  
more powerful.