That's were Redundant Array of Inexpensive Disks (RAID) systems are essentially useful with the highend systems. It can offer fault tolerance and higher throughput levels than a single hard drive or group of independent hard drives.. But storage and reliability requirements for the high-end enterprise systems exceed the features available with the single drives. RAID technology was developed to address the faulttolerance and performance limitations of conventional disk storage.5-inch hard-disk drives dominate the storage systems for all practical purposes.Low cost, high performance, 3. Arrays were