The StarTech.com SCA drive drawer is an aluminum drive caddy and receiving bay for internally mounting 3.5" SCA drives into half-height, 5.25" peripheral bays. This allows SCA hard drives to be quickly added or removed from any PC with an available 5.25 inch drive bay without opening the computer. The 2-piece unit consists of a bay that mounts into the PC and a removable drawer or caddy that encases the hard disk. A locking mechanism controls power to the drive to prevent it from being removed while operating. A handle activated drawer release mechanism allows the drive to be inserted or removed with minimal force. Dual front mounted ball-bearing cooling fans provide fresh cool air flow over the hard drive, preventing overheating and data loss. Additionally, if your drive gets too hot or if the fan fails, the built-in alarm will sound, warning you of the problem. The Removable Hard Disk Drawer is perfect for educational use, where the same PC needs to run several different operating systems, high speed, high capacity backups, hot-swap server drives, or any mission critical PC where downtime must be minimized.