Non-volatile memory and method with control data management
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United States of America Patent
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Nov 1, 2011
Grant Date -
Jun 30, 2005
app pub date -
Aug 13, 2004
filing date -
Dec 30, 2003
priority date (Note) -
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Abstract
In a nonvolatile memory with block management system, critical data such as control data for the block management system is maintained in duplicates. Various methods are described for robustly writing and reading two copies of critical data in multi-state memory. In another aspect of the invention, a preemptive garbage collection on memory block containing control data avoids an undesirable situation where a large number of such memory blocks need be garbage collected at the same time.
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