SAS Expander Virtual Wide Port Emulation

The patent creates virtual copies of the physical PHY interface by presenting multiple virtual PHYs (vPHYs) to the initiator. Each vPHY appears as a separate physical link, allowing multiple concurrent connections while sharing the underlying physical infrastructure. This copying approach enables bandwidth multiplication without proportionally increasing physical hardware complexity.

The patent introduces a virtualization dimension between the physical PHY and the initiator interface. By creating a virtual layer that presents multiple logical interfaces from a single physical interface, the system achieves higher bandwidth utilization without adding proportional physical complexity. This dimensional transformation allows the system to operate in both physical and virtual spaces simultaneously.

The expander device is designed to perform multiple functions: it acts as both a physical interface controller and a virtualization manager. The same physical PHY infrastructure serves multiple virtual connections simultaneously, allowing the device to handle multiple data streams through a single physical link. This multi-functionality enables the system to achieve high data transfer rates without proportionally increasing hardware complexity.

The patent introduces a virtualization layer as an intermediary between the physical PHY and the initiator. This intermediary manages the mapping between virtual and physical interfaces, handling connection establishment, data routing, and resource allocation. By placing this intelligent mediator in place, the system achieves complex virtualized functionality without requiring proportional increases in physical hardware complexity.

The system creates virtual copies of the physical link interface, presenting multiple vPHYs to the initiator that all share the underlying physical PHY infrastructure. This copying mechanism allows the system to achieve high bandwidth utilization by enabling multiple concurrent data streams, while the shared physical infrastructure prevents proportional increases in hardware complexity.

The patent merges multiple virtual connections onto a single physical infrastructure. By combining multiple vPHYs that share the same physical PHY, the system achieves high bandwidth utilization through efficient resource sharing. This merging approach allows multiple data streams to coexist on the same physical link, maximizing bandwidth utilization without requiring separate physical hardware for each connection.