| 摘要 |
PROBLEM TO BE SOLVED: To provide a patterned medium which has improved reading and writing of the data islands, as well as, increased areal data density. SOLUTION: A patterned medium 210 has a plurality of discrete data islands 230 arranged inside a plurality of tracks, and the plurality of tracks are arranged inside a plurality of multi-track groups or "hypertracks". The plurality of islands have an equal island-spacing (IS) distance in the along-the-track direction and within each hypertrack the tracks are spaced-apart an equal track-spacing (TS) distance. If there are N tracks in a hypertrack, the islands in each track of the hypertrack are shifted in a direction along the track by 1/N times IS, from the islands in adjacent and separate tracks in the same hypertrack. COPYRIGHT: (C)2008,JPO&INPIT
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