I've noticed there aren't a lot of reasonable home/sb m.2 NVME NAS options for main boards and enclosures.
SATA SSD still seems like the way you have to go for a 5 to 8 drive system (boot disk + 4+ raid6).
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SATA SSD still seems like the way you have to go for a 5 to 8 drive system (boot disk + 4+ raid6).
In practice you can put 4 drives in the x16 slot intended for a GPU, 1 drive each in any remaining PCIe slots, plus whatever is available onboard. 8 should be doable, but I doubt you can go beyond 12.
I know there are some $2000 PCIe cards with onboard switches so you can stick 8 NVMe drives on there - even with an x1 upstream connection - but at that point you're better off going for a Threadripper board.