Fibre Channel (FC) Host Bus Adapters (HBA) are interface cards that link the host system to a fibre channel network or devices. QLogic and Emulex are the two leading producers of FC HBAs, and many HBA drivers are provided in-box with the operating systems. In the early SAN storage system, the server and switch data transmission is through the optical fiber. By Robert Sheldon and Carol Sliwa An HBA also provides input/output (I/O) processing to reduce the load on the host's microprocessor when storing. Originally developed in the 1980s, basic SCSI is a block-level protocol that connects disks to a Host Bus Adapter (HBA) using flat cables. The HBA card serves a separate purpose from the.
