Dynamic adjustment of data protection schemes in flash storage systems based on temperature, power off duration and flash age

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United States of America Patent

PATENT NO 9571128
APP PUB NO 20160173136A1
SERIAL NO

15018942

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A data retention methodology for use in electrically rewritable nonvolatile storage systems is disclosed. The methodology collects characteristic data of the storage system (e.g., time stamps, program/erase cycles, sensed temperature over time, and others) and uses at least a portion of that data to associate various data retention schemes with the collected characteristic data. At power-on, the methodology determines a duration of a time during which power was not supplied to the storage system. The methodology also uses the power-on time to trigger the selection of an appropriate data protection scheme (e.g., enhanced ECC and/or read/scrub frequency). Dynamic selection and adjustment of the applied protection scheme may be based on the predetermined and/or calculated association between various protection schemes and the collected characteristic data of the storage system.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chunn, Adam C Houston, US 4 265
Excoffier, Franck Katy, US 13 46
Fry, Aaron D Houston, US 63 767
Simmons, Lincoln T Houston, US 18 262
Tressler, Gary A Sandy Hook, US 54 629
Walls, Andrew D Santa Jose, US 98 1883

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