WRITE PERFORMANCE PRESERVATION WITH SNAPSHOTS
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United States of America Patent
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app pub date -
Nov 4, 2014
filing date -
Nov 4, 2013
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Abandoned
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Abstract
Storage systems and methods for performing write commands and preserving data. A write is received to a first logical page in first memory. The first logical page corresponds to a first physical page. The write command is redirected to a second physical page different from the first physical page. Data is written to the new physical page in response to the write request. After writing the data to the new physical page, the data is copied from the first physical page to second memory. The write operation is not, therefore, delayed while data is copied for preservation. The first memory may comprise NAND based flash memory, for example, such as an SSD.
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