In a redundant fabric configuration, which of the following is the MINIMUM number of single port HBAs that a server must have, to sustain a single fabric failure?

One HBA creates a single point of failure; if the connected fabric fails, the server loses all storage connectivity.

A redundant fabric configuration involves two independent Fibre Channel fabrics (Fabric A and Fabric B). To ensure continuous connectivity to storage, a server must have at least one HBA connected to Fabric A and another HBA connected to Fabric B. This setup provides two distinct paths, allowing the server to maintain storage access even if one entire fabric experiences an outage.

Four HBAs provide more redundancy or bandwidth than the minimum required to sustain a single fabric failure.

Eight HBAs are significantly more than the minimum needed for basic redundancy against a single fabric failure.