Re: Question:
Software raid has a much better chance of keeping up with your needs, especially since there are fewer instances of spinning rust, and the related paradigms that host cards were built with, and (except at this sort of scale) we have enough spare CPU on the side to manage it, rather than having to offload it to a separate processor. But at this scale, you wouldn't want to fund the development of a controller card powerful enough, given how few units would ship.