Square Circle Consulting encounters a wide variety of issues with hundreds of users at different customer sites and periodically warns customers about important issues.

Some CD-Rs may fail within two years. You can protect your CD data with proper care and handling, high-quality media (Phthalocyanine dye on gold is the best), and by periodic testing to confirm longevity (special software can detect hidden problems) or identify the need to duplicate the original discs while they are still readable.