Microchip Adaptec SmartRAID Ultra 3254-16e /e Adapter - 24Gb/s SAS, Serial ATA/600, NVMe - PCI Express 4.0 x16 - Low-profile - Plug-in Card - RAID Supported - 1, 10 Triple RAID Level - 16 Total SAS Port(s) - 16 SAS Port(s) External - PC, Linux - 4 GB - Windows Server, Windows 10, Red Hat Enterprise Linux, CentOS, SuSE Linux Enterprise Server, Ubuntu Linux, Debian Linux, Oracle Linux, Citrix XenServer, Solaris, FreeBSD OS, ... Supported Operating System: