Step-by-step explanation:SAN(Storage area network) technology is the network technology that is used for the accessing of the block level network towards the storage units. It is made up of the storage components, switches etc.
RAID(Redundant Array of Independent Disks) and IP(internet protocol) is used as the precursor because they work better than the SAN. They have the ability to solve the issue that occur in the SAN technology like complexity,and other faulty issues.They maintain the fault tolerance quality and maintaining the network.