Nintendo is fixing the systems with dual-layer dilemmas free of charge, in spite of service contract status. Each Nintendo optical disc is enclosed with a BCA mark. This type of bar code that engraved to the disc is a YAG laser. Another example of DVD medium with BCA marks is the break off DIVX format. A BCA mark is able to seen to the naked eye. It should not be puzzled with the IFPI mark that is on all optical discs. BCA is explained that the DVD physical specification or conditions can be seen among radius 22.3mm (+0.0/-0.4mm) and 23.5mm (+/-0.5mm).
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