It's striped using Apple's drivers?

I think the G5 was the first to support booting with Apple's RAID drivers. Some forum posts indicated MDD may also support this. Xserve definitely supports this.

I used a RAID 0 on my G5 for years, but switched to non-RAID when I upgraded to Leopard. It's not any slower, I don't have that much data (I'm only using 38 GB out of 232 GB), and I changed the other drive to a Time Machine drive, which is a lot safer.