PCIE X8 RAID CTRL 8PT 16MB RAID 0 1 10 5 The Supermicro UIO MegaRAID AOC-USAS-L4iR features 4 internal and 4 external SAS connectors for high-performance storage connectivity. Using a LSISAS 1068E I/O processor with Fusion-MPT (Message Passing Technology) for optimum RAID performance and a PCI Express host interface for increased bandwidth, this UIO internal RAID adapter delivers an intelligent and robust RAID solution. The AOC-USAS-L4iR with iButton supports RAID 5 plus RAID 0, 1, 10. In addition, this UIO adapter supports MegaRAID Storage Manager Software and port independent auto-negotiation.