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Veritas Storage Foundation for Windows: Dynamic Multi-Pathing Competitive Comparisons

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Executive Summary

Multi-pathing software provides the intelligence necessary to manage multiple I/O paths between a server and a storage subsystem. When configured for redundancy, a single path is dedicated to I/O transfer, while other paths are in standby mode. The software manages failover between the I/O paths, thus eliminating the potential for a single point of failure. If connectivity along one path to a storage device is interrupted, the multi-pathing software dynamically switches I/Os to a surviving path, allowing application access to continue unimpeded. The other mode of operation allows for all paths to be utilized for I/O transfer. This can improve performance by leveraging the presence of these multiple paths, increasing the available bandwidth for I/O traffic.

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