The HP 397739-001, also known as the HP FC2142SR, is a 4Gb Fibre Channel Host Bus Adapter (HBA) designed for HP servers. It offers a single port for connectivity, making it an essential component for building or expanding storage area networks (SANs). This HBA provides a high-speed link between the server and a networked storage system, facilitating fast data access and transfer. With support for 4Gbps Fibre Channel speed, it enhances the data throughput and reduces the response time of storage-intensive applications. The HP FC2142SR is compatible with a wide range of HP ProLiant DL and ML series servers, allowing businesses to achieve enhanced data management and accessibility in a secure and reliable manner.