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Dell Chassis Management Controller Version 3.10 for Dell EMC PowerEdge VRTX User's Guide

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Grid Redundancy Policy

The purpose of the Grid redundancy policy is to enable a modular enclosure system to operate in a mode in which it can tolerate AC power failures. These failures may originate in the AC power grid, the cabling and delivery, or a PSU itself.

When you configure a system for Grid redundancy, the PSUs are divided into grids: PSUs in slots 1 and 2 are in the first grid while PSUs in slots 3 and 4 are in the second grid. CMC manages power so that if there is a failure of either grid, the system continues to operate without any degradation. Grid redundancy also tolerates failures of individual PSUs.

  • NOTE: One role of Grid redundancy is to provide seamless server operation despite failure of a whole power grid, but the most power is available to maintain Grid redundancy when the capacities of the two grids are approximately equal.
  • NOTE: Grid redundancy is only met when the load requirements do not exceed the capacity of the weakest power grid.

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