Just bought a new sata card works like a charm plug and play no need to export drives or anything like if sata ports where from motherboard. literately plugged it in plugged new hard drives boot up dsm and boom all showed up, dint need to plug screen and keyboard to server to set up new hard drives.
4Tb hard drives FYI no problem
https://www.amazon.com/gp/product/B00AZ9T3OU/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1