EqualLogic PS Series arrays are based on a virtualized modular storage architecture that enables IT managers to purchase only the storage that is needed, when it is needed — to help prevent both under utilization and over-provisioning. Using patented data movement technology, all PS Series arrays can work together to automatically manage data, load balance across system resources and expand to meet growing needs. The EqualLogic PS Series is designed to meet and exceed the ruggedness requirements of the data center. The PS6000XV includes fault tolerance capabilities through fully redundant and hot-swappable components — dual-controllers, standard dual fan trays, dual power supplies and disk drives with hot spares. Self-tuning write-back caches are battery-backed and mirrored across controllers for the ultimate protection without compromising performance.