Which of the following is NOT a type of shared storage?

The distinction lies in how shared storage systems are configured and utilized. Shared storage allows multiple servers to access the same storage resources simultaneously, facilitating collaboration, data sharing, and centralized management.

A SAN (Storage Area Network) array provides block-level storage over a high-speed network, enabling multiple servers to connect to storage devices and share access efficiently. NAS (Network Attached Storage) arrays operate on file-level sharing, allowing multiple users and servers to access the same data files over a network.

Unified storage merges both file and block storage, supporting both NAS and SAN architectures, allowing for more versatile storage solutions.

In contrast, Direct Attached Storage connects storage directly to a single server or computer, meaning it cannot be accessed by multiple servers simultaneously. This setup limits data sharing capabilities and doesn't fall into the category of shared storage, making it the correct choice in this context.