A system and method for reordering storage levels in a virtualized environment includes identifying a virtual machine to be transitioned and determining a new storage level order for the VM. The subsystems are powered by an electric source such as solar cells andor rechargeable batteries andor a wire extending to the unitary body from an external power source. The fragrant body is inserted into an inner pouch which has small apertures and the stagnant air within the inner pouch attains saturation of fragrance vapor, thereby stopping further evaporation of the essential oils. The improved technique and apparatus permits the use of any pattern of bits as a calibration test pattern, programmable by the user or using easily-interchangeable hardware.