> 
> Well, it would be nice to have NetBSD able to share the "drive" with
> other HPT RAID aware operating systems.

what does it mean "HPT RAID aware"?

stripping is NOT hardware RAID, no hardware could assist in simple using 2
disk in parallel.
> Also, the RAID0/1 boot problem might be solved since the BIOS can actually
> load from the array.
> 
> (but as you say, perhaps not really worth it)
yes..

easy solution - install only netbsd :)