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Data storage plays an essential role in todaypsilas fast-growing data-intensive network services. New standards and products emerge very rapidly for networked data storage. It should be very obvious that there is no single optimal design for all the different kinds of optical networks that can be applied to cover all requirements, as well as handle all applications. iSCSI is one of the most recent standards that allow SCSI protocols to be carried out over IP networks. In this paper, analysis of next generation storage network's architecture, which based on optical communication technologies, is given, and IBM's GDPS is shown as an example.