5
RockPro64 with 4 drives?
(lemmy.ml)
Pine64 is an organization that designs, manufactures, and sells single-board computers, notebook computers, a smartwatch, and smartphones.
This list gives you an overview of PCIe devices and their compatibility. If I remember correctly there are some hardware bugs in the rk3399 which makes stock linux hiccup on some SATA-Card/Drive combinations, though it's some time ago that I did fiddle with that. In my experience mrfixit2001's kernel is stable in these secenarios.