This 900GB hard disk drive from Cisco is designed to fit into a 2.5 inch form factor and is compatible with SAS interfaces. It has a storage capacity of 900GB and supports HDD drive types. The UCS-HD900G10K12G model comes with a caddy for easy installation. This item is perfect for those looking to upgrade their server's storage capacity. It has been tested and proven to be a reliable option for data storage needs.