Improved clustered storage systems make use of a software toggle switch stored in a shared persistent configuration database, which allows a peer node to be rebooted into a FIPS 140 mode defined by the switch and then to take over as master while the original master node reboots into the new FIPS 140 mode as defined by the switch. The hitch assembly may include an elongated body, at least one catch member, and a hitch stop. An optional contact probe module is used to collect a signal of the suspect region for medical diagnosis. Alignment of liquid crystal of a bulk state is controlled while the monomers are changed to polymers, thereby achieving an initial transparent state. A method for gesture recognition is also disclosed. According to exemplary embodiments of the invention, the photonic crystal-based optical element can be an optical interconnect, a lens, or a filter.