Taking cost out of the equation I have a question about speed performance of RAID. Does RAID 0 of 2 HDD outperform RAID 1+0 (or 0+1, not sure if it matters) using 4 HDDs? Same size drives etc. I don't know a ton about this so not sure if since you are backing up it is always going to slow it or as long as you have the same size, speed, etc it is pretty much the same. This is performance for a home system, not server type application.