A test method for a semiconductor memory device having a bidirectional data strobe terminal for a data strobe signal, and having at least one data terminal for a data signal at a test apparatus, which can at least generate data strobe and data signals and also transfer and evaluate data signals. In one embodiment, this invention is used by a data processing system including a system processor connected to a plurality of operating system instances that are allocated individual system functions. The degree of doming can accommodate any variance between the dimensions of the disc and that of the reformed base of the can. The birefringence inducer is coupled to the birefringence-controllable optical element and configured to induce birefringence on the birefringence-controllable optical element to provide polarization-retarded polarized light. These components cooperate to implement optimized UI remoting that is bandwidth efficient, low latency and CPU efficient.