HP Hotswap Hard Drive (HDD) Tray Caddy for 146.8GB Ultra320 3.5" Drives 404708-001. The Hot Swap Hard Drive Tray is specially designed as a spare / extra SATA / SAS / SCSI Hard Drive Tray, allowing you to use extra spare / replacement hard drives in addition to what is installed in the backplane / mobile rack. This extra hard drive tray features an upgraded design with additional air vents and specially designed vibration dampening springs, providing the ideal replacement for misplaced trays or a convenient solution for having extra hard drives available for your storage solution.

HP Part Number: 404708-001