Big Data, Big Storage
In this new age of ‘Big Data’, the need for more and more storage continues for what becomes quite massive amounts of data, effecting even small and moderate content and/or TAD producers... such as ourselves. I now have almost three dozen hard drives, most of which are 2-terabyte discs now, containing the files and data I use. This may be a modest amount of storage compared to other readers of this Magazine... but we can all use more.
I have recently become aware of a new method of large data storage on a DVD disc. DVDs are a good method of storage because of their ease of recording and their permanence. But they have always been limited because of the relatively small amount of data that could be stored on one... a bit less than 5 gigabytes. Even a Blu-ray disc can only hold a maximum of 50 gigabytes.
The recording method of burning depressions in a disc to represent data is done with a laser ray (Light Amplification by Simulated Emission of Radiation)... a red laser for regular DVDs, or a blue light laser for Blu-ray media. It turns out that the size of laser ray is limited by a law of physics. A point of light focused through a lens can not be smaller than half it’s wavelength. That’s about 500 nanometers for a red laser. (For comparison of size, a human hair is about 100,000 nanometers in diameter)
Using nanotechnology, researchers have developed
a technique to increase the data storage capacity
of a DVD from a measly 4.7GB to 1,000TB.
Photo Nature Communications.