This book is a comprehensive guide to storage systems, covering SAN, NAS, DAS, and object storage along with the technologies used to store data. It examines storage solutions for organizations of all sizes, discussing each system’s advantages and disadvantages. The book explains storage infrastructure, including physical components, connectivity, and storage networking, and introduces software-defined storage. It also covers disk arrays, RAID configurations, and data caching techniques. Additionally, the book explores storage communication protocols like SCSI, FC, and iSCSI, network topologies, access control methods, virtual volume management, load balancing, and failover strategies. Finally, it thoroughly addresses performance measurement, fault tolerance, data protection, and overall space efficiency features using modern management software for optimal results.