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Many vendors have now provided viable solution for this incompatibility. These enable the data to come across fabrics without integrating them. Initially there were no attuned hardware devices for fiber channel fabric. In order to develop a smooth and efficient SAN (Storage Area Network) architecture many fiber routing solutions are becoming popular. A typical fiber channel fabric comprises of many fiber channel switches. Fiber channel fabric also serves the same purpose. In a LAN network segment each device in a network share the same physical layer. This channel provides more steady and speedy access. The basic infrastructure of SAN (Storage Area Network) is based on fiber channel fabric, which is mainly designed for storage devices. Infrastructure of SAN (Storage Area Network) Main DAS (Direct Attached Storage) protocols are SATA, SAS and fiber channel. DAS (Direct Attached Storage) and SAN (Storage Area Network) can overcome this deficiency but both these networks are costly and difficult to handle. DAS (Direct Attached Storage) can be termed as an inefficient network because it cannot share its idle resources with other units in the network. In the same way we can convert NAS (Network Attached Storage) to a DAS (Direct Attached Storage) by disconnecting the entire network and attach the port to a single computer. DAS (Direct Attached Storage) can also provide multiple and parallel access if we equip this network with multiple ports.

The aim of the NAS (Network Attached Storage) is to provide only file based storage devices. In a network attached storage system, many independent clients can access the storage memory. Main distinguishing character of DAS (Direct Attached Storage) is its direct connectivity through a host bus adapter without the use of the networking devices as hubs, bridges and switches. DAS is so named because it is a directly attached to a server without any intermediary network involved.

A network which is created by attaching storage devices such as disk arrays and tapes to a common server so that the storage devices appear to be confined to operating system is known as storage area network.ĭata in SAN (Storage Area Network) can be stored using two basic modules as DAS (Direct Attached Storage) and NAS (Network Attached Storage).