what is hba
HBA (Host Bus Adapter). A HBA (host bus adapter) is an integrated circuit adapter or circuit board that is designed to provide physical connectivity between a computer host and storage devices or a network.his entity does not have to be a hardware port. It can be implemented in other devices such as an HBA located on a server, a FC switch, or disk storage. Point-to-Point. The Point-to-point (FC-P2P) topology is defined as two devices that are directly connected to each other.