A Chief Information Officer (CIO) has determined that creating a highly available environment is desirable, but budget concerns will dictate what redundancy is added in the near future. Which of the…

Implementing a Virtual Tape Library (VTL) backup solution addresses data recovery and retention, not immediate high availability, and does not prevent application downtime resulting from storage path failures.

Installing a secondary storage array for mirroring data offers excellent high availability and disaster recovery, but it is a very expensive solution, which contradicts the 'budget concerns' specified in the question.

Installing multiple port HBAs (or multiple single-port HBAs) on SAN-connected servers provides redundant paths from the server to the storage, preventing a single HBA failure from causing an outage and offering basic path redundancy without requiring a second storage array.

Installing duplicate storage array controllers within a single array is a standard high-availability feature for the array itself, but it does not address path redundancy from the host server or fabric redundancy.

Deploying switches to provide a secondary fabric creates two independent, isolated paths between servers and storage arrays. This eliminates the fabric itself as a single point of failure and ensures continued connectivity and data access even if one fabric experiences an issue.