HPE - Certified Genuine Parts Smart Array P816i-a SR Gen10 SAS Controller - 12Gb/s SAS, Serial ATA/600 - PCI Express 3.0 x8 - Plug-in Module - RAID Supported - 0, 1, 5, 6, 10, 50, 60, 1 ADM, 10 ADM RAID Level - 4 x4 internal Mini-SAS ports - 16 Total SAS Port(s) - 16 SAS Port(s) Internal - 4 GB Flash Backed Cache - CentOS, ClearOS, Hyper-V, Windows Server, Red Hat Enterprise Linux, SuSE Linux Enterprise Server Supported Operating System: