Which of the following offers the highest level of redundancy in the design of a storage system?

A Dual Port HBA with a pair of Point-To-Point connections to the SAN provides port redundancy on the HBA but leaves the single HBA itself as a single point of failure.

Two Single Port HBAs connected to a fiber switch offer HBA redundancy, but the single fiber switch represents a single point of failure for all connections.

A Dual Port HBA with a Point-To-Point connection to a SAN offers port redundancy but the single HBA and the single connection path to the SAN are critical single points of failure.

This configuration provides comprehensive redundancy by eliminating multiple single points of failure. It includes redundant HBAs, redundant ports per HBA, and redundant fiber switches, ensuring multiple independent paths to the SAN and maintaining connectivity even if several components fail simultaneously.