Disk emulation for a non-volatile semiconductor memory utilizing a mapping table
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United States of America Patent
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May 13, 1997
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app pub date -
Apr 19, 1996
filing date -
Dec 31, 1990
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Abstract
A non-volatile semiconductor memory that is erased in blocks is described. The non-volatile semiconductor memory includes an active block for storing first data and a reserve block for storing second data. The second data is a copy of the first data. The copy is made during a clean-up operation prior to erasure of the active block. The non-volatile semiconductor memory also includes a mapping table for mapping a logical address of an allocation unit to a physical address of a sector within the non-volatile semiconductor memory.
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