Almost definitely U.2 drives that slot into the front of the server. Here's a cartoony view of what that looks like (on a P5800X Optane SSD): https://www.serve

Almost definitely U.2 drives that slot into the front of the server. Here's a cartoony view of what that looks like (on a P5800X Optane SSD): https://www.servethehome.com/new-intel-optane-p5800x-100-dwpd-ssd-dominates-pcie-gen4/ https://www.servethehome.com/new-intel-optane-p5800x-100-dwp...