an optically readable label provided at a U position of a plurality of U positions in a data center rack, wherein the optically readable label encodes location identifying information;

an optical reader provided in an electronic device, the optical reader configured to sense and read the location identifying information encoded on the optically readable label in response to being mounted in the U position in the data center rack and initial power on of the electronic device; and

an optical extension that extends from the optical reader to a front panel of the electronic device for reading the location identifying information.