D2 Professional includes the standards that make this d2 hard drive a true solution for professionals: performance, universal compatibility, and the high reliability of an enterprise-class hard drive housed in a completely aluminum unibody case. The case, forged from a single piece of aluminum, provides long-term durability due to its exceptional rigidity. The extremely quiet fan and the special aluminum casing dissipate heat from the hard drive, allowing for fast and error-free operation.