The Fusion-io ioDrive Duo is setup on a single stacked PCI-e card with two layers stacked on top of each other. Each layer represents a unique 640GB drive, which are merged together through the same slot interface. The design is very compact and clean, including a well-designed support bracket on the back portion of the card. This helps support the card in some mounting environments and gives it a nice finished appearance OS Compatibility: 64-Bit Microsoft XP/Vista/Win7/Server 2003/Server 2008, RHEL 4/5/6, SLES 10/11, OEL v5, VMware ESX 4.0/4.1/ESXi 4.1, Solaris 10 U8/U9 (x64)

• 1.2TB MLC NAND (two individual 640GB SSDs on one PCIe card)
• 1.5GB/s Read Bandwidth (64kB)
• 1.0GB/s Write Bandwidth (64kB)
• PCI-Express x4/x8 or PCI Express 2.0 x4
• Access Latency 0.029ms (512-byte)

1.2TB MLC NAND (two individual 640GB SSDs on one PCIe card)Fusion io