"Scientists have developed a method to store data on DNA and expects it to become an adequate alternative to hard discs within a decade...

... At the storage density achieved, a single gram of DNA is able to hold 2.2 million gigabits of information, which is around 468,000 DVDs. The researchers also added an error correction scheme, as well as encoding the information a number of times in order to ensure that data is read back with 100% accuracy."

http://preview.tinyurl.com/aoqktcz