In fabric-attached MetroCluster, a site failure is described as a __________.

• A. ISL failure
• B. Interconnect cable failure
• C. Complete failure of the primary controller and disk shelves
• D. Fibre Channel adapter malfunction

Answer: (C)

In fabric-attached MetroCluster, a site failure means the entire site becomes unavailable—the primary controller and all disk shelves in that site fail or lose connection. When that happens, the cluster must rely on the surviving site to continue servicing I/O, triggering failover mechanisms as designed. Other issues like an ISL inter-site link failure or an interconnect cable fault affect connectivity but don’t take down the whole site, and a single Fibre Channel adapter failure is a host/component fault rather than a full site outage. That full-site loss—primary controller plus disk shelves—is the event that defines a site failure.