Upload & Sell: Off
For those who can not use drobo, there is Synology, which offers similar features
I am personally very happy with my Synology 1812+ which is an 8 bay unit (8x WD RED 3TB). I am getting 100-120mb/s over Gigabit network. It would be nice to have 10GB but not yet.
PS: I wasn't a fan of the earlier Drobo's they were very slow - but over NIC as well as Firewire and USB - YMMV
And whom are you refering to ? that can't use Drobo ?
Drobo's comes with these interfaces: USB 2, USB 3, Firewire 400, Firewire 800, e-Sata, Thunderbolt, Gigabit Ethernet, 3 x Gigabit Ethernet for iSCSI.
And they have 4, 5, 8 & 12 bays units