Quoting from the Emulex official announcement:
Emulex Corporation today announced its LightPulse® Virtual Host Bus Adapter (HBA) technology is now available for Microsoft System Center Virtual Machine Manager 2007. This marks the first integrated storage area network (SAN) connectivity solution with industry-standard N-Port ID Virtualization (NPIV) support for Microsoft Windows Server virtualization environments.
Emulex’s LightPulse Virtual HBA technology, composed of Emulex 4Gb/s Fibre Channel HBAs supporting NPIV, enables customers to effectively ‘virtualize’ SAN connections so that each virtual machine has independent access to its own protected storage. In addition, Emulex LightPulse Virtual HBA technology enables administrators to leverage standard SAN management tools and best practices, such as fabric zoning and LUN mapping/masking, and, enhanced management and migration of virtual machines. It also provides the most efficient utilization of the HBAs in the server while ensuring the highest level of data protection available in the industry…