The preferred embodiments described herein provide a memory device and methods for use therewith. In one preferred embodiment, a method is presented for using a file system to dynamically respond to variability in an indicated minimum number of memory cells of first and second write-once memory devices....http://www.google.com.hk/patents/US6647471?utm_source=gb-gplus-share專利 US6647471 - Methods for overwriting data in a memory device