The fast growth in storage capacity and processing power in enterprise installations coupled with the need for high availability, requires Storage Area Network (SAN) architecture to provide seamless addition of storage and performance elements without downtime. Virtualization provides consolidation and uniform management of storage resources for SANs with multiple servers and multiple storage sub-systems. The industry goal is for storage virtualization that is inexpensive, does not affect performance, and that is flexible enough to be applied to various types of systems and networks without requiring significant investments in time or resources. This paper presents the available storage methods and a virtualization method that provides the storage management benefits offered by existing techniques without the corresponding drawbacks.
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