Variable bit encoding per NAND flash cell to extend life of flash-based storage devices and preserve over-provisioning
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United States of America Patent
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Jan 9, 2018
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app pub date -
Feb 24, 2017
filing date -
May 20, 2015
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Abstract
Systems, methods, and/or devices are used to implement variable bit encoding per NAND flash cell to extend life of flash-based storage devices and preserve over-provisioning. In some embodiments, the method includes detecting a trigger condition with respect to one or more non-volatile memory portions (e.g., portions configured to store data encoded in a first encoding format and having a first storage density) of a plurality of non-volatile memory portions of a storage device. In response to detecting the trigger condition and in accordance with a first determination that a projected amount of over-provisioning (e.g., corresponding to over-provisioning for the storage device after reconfiguring the one or more non-volatile memory portions to store data encoded in a second encoding format and having a second storage density) meets predefined over-provisioning criteria, the method includes reconfiguring the one or more non-volatile memory portions to store data encoded in the second encoding format.
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