This Dell PowerEdge 2900 Server has one 500GB SATA drive installed in Bay 0 that has an inactivated Windows 10 operating system. This computer does accept a USB drive to boot to if you use the rear USB ports. You could install another operating system like Linux or Windows Server 2012 R2.Two Xeon 5130 2.00GHZ CPUs4GB Ram500GB Sata HDD3.5" Floppy DriveDVD DriveSCSI Card 39160 - Ultra160 SCSIDell PERC 5/i IntegratedOnly one of the two redundant power supplies work.The Dell PowerEdge 2900 is a versatile dual socket 4U rackmount or tower server ideal for just about any application, including virtualization. The PowerEdge 2900 can be equipped with up to two 64-bit dual or quad core VT enabled Intel Xeon processors, up to 96GB RAM and up to ten 3.5" SATA, SAS or solid state drives, providing loads of scalability. With dual onboard gigabit NIC's, and four PCIe and two 64-bit PCI-X slots, the PowerEdge 2900 has the connectivity to be deployed for any number of uses such as virtualization, file/print, network storage, web, database, messaging and other critical applications.