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Windows Server and Hyper-V natively support MPIO. A Device Specific Module (DSM) provides MPIO support. The DSM that is bundled with the Windows Server operating system is fully supported with PowerStore arrays.
Windows and Hyper-V hosts default to the Round Robin with Subset policy with PowerStore. Round Robin with Subset will work well for most Hyper-V environments. Specify a different supported MPIO policy if wanted.
When each PowerStore storage controller (Node A and Node B) has four FC front-end (FE) paths connected to dual fabrics, eight paths are visible to the host server. Connecting fewer FE paths, such as two on each controller for four paths total, is also acceptable.
The Active/Optimized paths are associated with the PowerStore storage controller that the volume is assigned to. The Active/Unoptimized paths are associated with the secondary or standby PowerStore storage controller for that same volume.
When creating volumes on PowerStore, the wizard will alternate controller ownership in a round-robin fashion to help load balance the controllers. Administrators can override this behavior and specify a specific controller when creating a volume.
Best practices recommendations include: