Abstract: The present invention is a system and method for detecting the presence of a cable in a connector. The system may comprise one or more of the following features: (a) a first circuit contact; (b) a second circuit contact; (c) a first capacitive element; (d) an electrical ground; (e) a voltage source; and (f) a logical output. The second circuit contact may be connected to ground. The capacitive element may be driven to ground by connection of the first and second circuit contacts to corresponding cable contacts.

Abstract: A system of keying implementation for swapping paired devices is provided. The system includes a controller module having a first keying member, a power supply unit having a second keying member, and a chassis having a plurality of receiving slots for receiving the controller module and the power supply unit. When the controller module and the power supply unit are a matched pair and when the controller module and the power supply unit are fully inserted, next to each other, into the plurality of receiving slots, the first keying member and the second keying member do not interfere with each other so that the power supply unit may supply power to the controller module.

Abstract: A hard disk drive system includes a plurality of hard disk drive carriers and a hard disk drive chassis. Each of the plurality of hard disk drive carriers has a body and an ejector rotatably connected to the body. The ejector includes a first alignment member on a first side of the ejector and a second alignment member on a second side of the ejector. The second side of the ejector is opposite the first side of the ejector. The hard disk drive chassis includes a plurality of receiving slots for receiving the plurality of hard disk drive carriers. Two of the plurality of hard disk drive carriers may be fully inserted, next to each other, into the plurality of receiving slots.