An optical disk has a recording region divided into zones, each zone including a number of adjacent physical tracks. An integer number of sectors are provided in each physical track. The angular recording density is higher in the more outward zones such that the linear recording density is substantially...http://www.google.com.hk/patents/US6151292?utm_source=gb-gplus-share專利 US6151292 - Optical disk having sequentially numbered sectors and logical tracks formed by a series of 2.sup.n sectors, and disk drive apparatus for using such an optical disk
