SAN is now recognized as the most efficient storage structure, offering block-level
access using high-speed connections such as Fiber Channel, iSCSI, and InfiniBand
between servers and storage system. This structure provides higher scalability,
availability, performance, and cost efficiency compared to DAS structure. SAN
storage systems support high performance, high security, large distance between
storage and servers, and easy backup facilities compared to other storage
structures, while having higher complexity and cost.