HPE Smart Array P421 External PCIe SAS Controller - PCI Express 3.0 - Low-profile - Plug-in Card - RAID Supported - 0, 1 ADM, 1, 1+0, 5, 50, 6, 60 RAID Level - 2 Total SAS Port(s) - 2 SAS Port(s) Internal - 2 SAS Port(s) External - PC Flash Backed Cache: