Which are advantages of SAN storage?

SAN storage provides several major advantages over direct-attached storage. High resource utilization is achieved because multiple servers can share centralized storage resources instead of leaving capacity stranded on individual servers. High scalability is another advantage because capacity and performance can be expanded by adding disks, controllers, paths, or storage arrays without redesigning each host individually. High reliability comes from enterprise storage features such as redundant controllers, multipathing, RAID protection, hot-swappable components, and mature failover mechanisms. SAN also provides high performance because it delivers block-level access through dedicated storage networks such as Fibre Channel, iSCSI, or InfiniBand. This makes SAN especially suitable for databases, virtualization platforms, and mission-critical enterprise applications. Therefore, all four listed options are valid advantages of SAN storage.