The Z-Drive R4 is a PCIe SSD available in 4 and 8-controller versions targeted squarely at the enterprise. Apparently some of OCZ's customers wanted an even beefier version, which OCZ has delivered in the form of the Z-Drive R4 CloudServ (RM1616). Featuring sixteen SandForce SF-2582 controllers, the RM1616 supports up to 16TB of NAND on a single, double slot, PCIe card. The interface remains PCIe x8 although the connector is physically a x16 interface. The RM1616 is organized into two 8-controller sets, each behind an OCZ VCA chip.
OCZ's consumer accessible PCIe SSD line is the RevoDrive, but if you're an enterprise customer and want a custom configuration OCZ will build you a Z-Drive. To show you...13 by Anand Lal Shimpi on 5/31/2011