The nitrogen vacancy (NV) centre can be used for long-term information storage. So say researchers at City University of New York–City College of New York who have used optical microscopy to read, write and reset information in a diamond crystal defect. The 2D bit density in this system is comparable to present-day DVD technology but its storage capacity has even been extended to 3D without affecting the already written data….
http://nanotechweb.org/cws/article/tech/66811
