The IBM 181492H Express IBM System Storage EXP395 Expansion Unit is an external disk storage expansion chassis designed to enhance the storage capacity and flexibility of IBM DS3950 and DS3950 Express storage systems. It facilitates easy and seamless scaling of storage infrastructure, allowing businesses to address their growing data storage requirements without incurring the costs and complexities associated with a complete system overhaul. The EXP395 contains 16 drive bays that support high-capacity Fibre Channel drives, offering a scalable and cost-effective solution for increasing storage capacity. It is engineered for organizations that need to expand their storage capabilities efficiently, providing a straightforward and reliable path for data growth. Additionally, it is compatible with a wide range of drive types, ensuring versatile and high-performance storage expansion.