PowerPath operates between the application and the HBA driver. The application directs I/O operations to the HBA driver. The I/O is intercepted by PowerPath which then sends the I/O to the appropriate path based on current workload and path availability. If the I/O is not deliverable due to a path failure, PowerPath receives the failure and redirects the I/O to another path to the volume. Therefore, PowerPath improves application performance and availability through its path management capabilities.
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