In Microsoft Azure, which architectural feature allows continued access to NAS data when a high-availability node fails?

The correct answer highlights the architecture of high-availability (HA) configurations in Microsoft Azure, specifically regarding Network Attached Storage (NAS). In a high-availability setup, it is crucial for client applications to maintain access to data even when one of the nodes in the HA pair encounters a failure.

In this context, the architecture allows each node to have the capability to access the data stored on the partner node seamlessly. This means that if one node fails, the other node can continue to provide access to the same data without interruption. Thus, there is no single point of failure concerning data access; both nodes work collaboratively to ensure high availability and reliability. This design ensures that business continuity can be maintained during node failures.

The other options describe various features but do not encapsulate the architectural arrangement that guarantees continued access specifically during a high-availability node failure. For example, while synchronously mirroring data can be part of a high-availability framework, it doesn't inherently address the ability of nodes to access each other's data in a way that guarantees continued access during a node failure. Similarly, the concept of clones or single copies focuses on data management rather than on how HA configurations maintain data access availability.