An extensible file system format for portable storage media is provided. The IT appliance hosting facilities software can be implemented at a layer of abstraction above a virtual machine host, which is implemented in a layer of abstraction above a hardware layer of a computing system. The series of lamps is arranged around an axis of rotation running parallel to its longitudinal axis and rotates at a specific rotary speed. A computer, which may be mounted in the spectrometer, compares the detected reflectance spectrum with stored sample data spectra, and identifies the material or the components of the material and their proportions.