US Patent 11099613 Floating interposer

The front of a rack-mounted 2RU (Rack Unit) chassis includes bays that receive replaceable components, such as storage drives. Two rear slots of such chassis may each receive 1RU servers that couple to a chassis midplane via interposers. Administration of such 2RU chassis is simplified when a 1 RU server can be installed identically in the top or bottom chassis slot. Embodiments provide this capability while avoiding locating interposers along the center of the midplane. A lower guide routes a floating interposer of the server to lower midplane connectors as the server is inserted in the lower slot. An upper guide routes the floating interposer to upper midplane connectors as the server is inserted in the upper slot. The floating interposer moves up and down based vertical travel of guidewheels that protrude from the server and are routed by the guides as the server is inserted in a slot.