NPIV (N_Port ID Virtualization) is the feature that needs to be enabled on B-series FC switches to allow individual virtual servers to have independent storage access. NPIV allows multiple virtual machines to share a single physical Fibre Channel port while maintaining separate identities (N_Port IDs), enabling each virtual machine to be seen as a separate entity on the SAN. This is crucial in a virtualized environment where individual virtual servers need direct storage access.
Reference:
HPE B-Series SAN Switches
HPE Virtualization Solutions