In a dual-controller, active-active storage system, what is the main operational characteristic?

In a dual-controller, active-active storage system, both controllers are operational and capable of processing and responding to requests simultaneously. This design enhances performance and ensures high availability, as workload can be balanced between the two controllers. If one controller fails or becomes unavailable, the other can seamlessly take over the workload without disrupting service. Consequently, this configuration maximizes resource utilization and minimizes latency, as both controllers work together to manage input/output operations.

The other options do not accurately depict the functionality of a dual-controller, active-active system. Inactive controllers or scenarios where only one controller processes requests would not provide the full benefits associated with high availability and performance that such systems aim for. Overall, the primary characteristic of active-active configurations hinges on the collaborative operational capacity of both controllers.