The Seagate Cheetah 15K RPM U320-SCA ST336753LC 80PIN hard drive is a high-performance server hard drive with a storage capacity of 36GB. With a read speed of 320MB/s and a rotation speed of 15,000 RPM, this drive offers fast and reliable storage for servers. The Ultra-320 SCSI interface ensures efficient data transfer, while the 8MB cache provides quick access to frequently used data. Seagate's Cheetah product line is known for its high-performance and durability, making it a great choice for businesses and organizations needing reliable storage solutions.Pulled from working system. Caddy model#2523. I'm not quite sure who makes the caddy. Free shipping USA only