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

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...

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Hauptverfasser: Walls Andrew D, Simmons Lincoln T, Fry Aaron D, Excoffier Franck, Tressler Gary A, Chunn Adam C
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creator Walls Andrew D
Simmons Lincoln T
Fry Aaron D
Excoffier Franck
Tressler Gary A
Chunn Adam C
description 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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subjects BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODE CONVERSION IN GENERAL
CODING
COMPUTING
COUNTING
DECODING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
INFORMATION STORAGE
PHYSICS
STATIC STORES
title Dynamic adjustment of data protection schemes in flash storage systems based on temperature, power off duration and flash age
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