An air containment system for a datacenter. The plug connector also includes a clamping member or clamping insert in order to also fix the electrical cable relative to the housing, which takes place by a clamping nut, preferably by a union nut. A method for reading a current track of data, that has been subject to previous encroachment to an extent from at least one adjacent track of data, includes writing interfering data to the adjacent track of data while intentionally encroaching at least to that extent onto the current track of data, and recovering data on the current track of data using the interfering data. The highly doped GaAlN layer is then formed having electron densities beyond 1\xd71020 cm\u22123 at Al mole fractions up to 65% are obtained.