Perish the thought! The solution they have in mind for expansion is more like:

http://www.promise.com/news_room/news.aspx?m=23&region=en-gl...

E.g.,

http://store.apple.com/us/product/HE153VC/A/promise-pegasus2...

I have had the predecessor device, a 6bay Thunderbolt RAID 6, for two years and it has been quiet and reliable.

Oh those are pretty neat. Imagine if your motherboard was in there with your drives? That would be so convenient.

I'll be shocked if someone doesn't make a similar looking case for a stack of HDs.