Dell 4TB SAS HDD This nearline, self-encrypting Dell 4TB HDD is designed for data intensive storage needs and mission critical applications. Featuring the quality build and reliable durability of Dells technology. SAS HDD Technology This Dell LFF HDD is supported by a SAS interface, allowing it to transfer data at a rate of 6GB/s to help reduce the risk of bottlenecks forming. Dell SAS Hard Disk Drive Featuring a spindle speed of 7200RPM and supporting hot-swappable technology this HP write intensive drive provides a feature-rich and efficient storage option designed to enhance the productivity of your computer server.