I think You're looking for something called a "tri-mode HBA." They run about $200 on ebay and as you mentioned- the m.2 to u.2, u.3, etc is passive (minus power)

▲

rmb938 2 days ago | parent | next [-]

That's not really a M.2 nvme to sata converter though. That's just something that can take pci-e lanes and either give them to nvme drives through a pci-e multiplexer or convert the pci-e lanes to saas or sata. It also isn't passive, there's lots of processors to make it happen.

	▲	privatelypublic 17 hours ago \| parent [-]
		Once they talk about adding a SATA controller- imho, trimode controllers become the obvious solution. If you want to get super hacky, if the SATA backplane is direct instead of multiplexed, passing a single lane of PCIe over SATA is possible. Probably limited to pcie 2.0 though. And they're absolute abominations, real frankensteins monster stuff. Edit: I mean the physical layer. Obviously you can't control a pcie device with a sata controller, but the cable will do a single wide pcie link.

▲

2 days ago | parent | prev [-]

[deleted]