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The term coaster is often to used to describe an optical disk that was ruined while trying to burn, or write to it (often caused by buffer underruns). However, it's also used to refer to any malfunctioning, unwanted or defective optical disk (CD or DVD media). The phrase is one which really caught on, and today you can find a plethora of CD and DVD burning guides which offer "coaster-free burning tips", designed to help consumers create a working disk on the first try. Adding to the terms popularity are Web sites that provide tips and tricks on "decorating and customizing" your CD coasters.

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