The 3U-30765 is a versatile 3U server chassis with removable hard drive cages. Each hard drive cage can accommodate up to five 3.5" hard drives, which can be installed without screws or tools. To cool the hard drives, each cage is equipped with a 120 mm fan that can be replaced from the outside without having to open the chassis. If fewer 3.5" drives are needed, the drive cages can be removed, allowing for the installation of three 5.25" drives in their place. Three additional 120 mm fans on the middle bridge of the chassis enhance airflow within the enclosure and protect your components from overheating. Additionally, there are two 60 mm fans installed in the rear panel, which together ensure optimal airflow.