Embodiments of methods and systems for controlling access to information stored on memory or data storage devices are disclosed. In various embodiments, fluid-mediated modification of information or access to information is utilized. According to various embodiments, data storage devices designed for...http://www.google.com.tw/patents/US7907486?utm_source=gb-gplus-share專利 US7907486 - Rotation responsive disk activation and deactivation mechanisms
