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The active pcie switches are a lot more expensive than the passive splitters that only work on systems with pcie bifurcation.



Nowadays some recent consumer platforms supports PCIe x16 to x4/x4/x4/x4 bifurcation that should be enough. For RAID, switching (dynamically shares bandwidth between SSDs) is nonsense, isn't it?


For a large scale storage system (more NVMe devices than PCIe lanes), a switch is mandatory. Or a “RAID” card or another switch-like device.




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