" Maximum 3.5" hot-swap drives density 36x (24 front + 12 rear) HDD bays"
http://www.supermicro.com/products/chassis/4U/847/SC847A-R1400.cfm
Did anybody else think "WTF?" when you saw that picture?
I have seen crazy stuff, but that one is pretty high-up on the list....
Doesn't that make cooling problematic?
And what do you think of the arrangement of the 48 disks in a thumper?
Anyway, you can have cooling problems even with 2U cases and just six disks if you have faulty fans so I do not really see a problem with the Supermicro case. You just need working fans.