The Dell Cheetah 15K.5 146 GB hard drive is a high-performance, internal HDD designed for enterprise applications. With a storage capacity of 146 GB and a rotation speed of 15000 RPM, this drive offers fast and efficient data storage and retrieval. The 3.5" form factor and hot swap feature make it easy to integrate into existing systems, while the 16 MB cache enhances overall performance. As part of the Cheetah product line from Dell, this HDD is a reliable choice for businesses looking to improve their storage capabilities.