A dual controller head storage array is zoned to two different fabrics. How should the administrator cable up the storage array to ensure redundancy and resiliency?

ISLing the FC switches together creates a single, larger fabric, which might negate the design intent of having two separate, redundant fabrics for disaster recovery or isolation.

Cabling both controller heads to a single switch creates a single point of failure; if that switch fails, the entire storage array becomes inaccessible, regardless of the second fabric.

To ensure maximum redundancy and resiliency in a dual controller storage array connected to two distinct fabrics, each controller head must have at least one active path connected to each fabric. This design allows hosts to maintain access to storage even if one controller, one fabric, or a single path fails.

This approach lacks full redundancy because if one controller fails, its associated fabric loses direct connectivity to the storage through that controller, potentially impacting performance or availability for hosts zoned to that fabric.