The document discusses storage area network (SAN) concepts and technologies. It describes how SANs increase storage utilization by consolidating storage and eliminating "islands" of dedicated storage. SANs provide higher availability than direct-attached storage by enabling features like backups without downtime and faster disaster recovery. The document outlines SAN protocols like Fibre Channel and iSCSI, as well as RAID levels and their characteristics. It also discusses business continuity strategies and how different replication technologies impact recovery point and recovery time objectives.
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