What is a notable benefit of an active-passive dual-controller storage architecture?

An active-passive dual-controller storage architecture is designed to ensure high availability and reliability of data storage systems. In this setup, one controller actively manages I/O operations while the other remains on standby, ready to take over immediately in case of a failure. This redundancy is a key feature that provides consistent performance during a controller failure.

When the active controller encounters an issue or fails, the passive controller can quickly assume control, minimizing downtime and maintaining uninterrupted access to stored data. This seamless transition is crucial for environments where data availability and business continuity are critical. Thus, the notable benefit is the assurance of consistent performance even if one controller becomes unavailable.

In contrast, while enhanced data access speed, higher storage capacity, and continuous data synchronization are relevant considerations in storage architectures, they do not specifically address the advantage of resilience and consistent performance during a controller failure, which is the primary focus of an active-passive configuration.