Systems and methods for enhanced data recovery in a solid state memory system

摘要

Systems and method relating generally to data processing, and more particularly to systems and methods for accessing a data set from a solid state storage device, using a data decoding circuit to apply a data decoding algorithm to the data set to yield a decoded output, where the decoded output includes at least one error, identifying at least one critical location in the data set, estimating a voltage associated with the data in the data set corresponding to the critical location, calculating soft information corresponding to the critical location based at least in part on the estimated voltage, and re-applying the data decoding algorithm to the data set guided by the soft information to yield an updated decoded output.

主权项

1. A data processing system, the system comprising:
a solid state memory device; and a data processing circuit to access a data set from the solid state memory device, the data processing circuit including:
a limited location re-read request circuit operable to identify a subset of elements of the data set derived from the solid state memory device exhibiting an increased likelihood of error, wherein identifying the subset of elements of the data set is based at least in part on selecting, up to a predetermined number of locations, one or more locations from the elements in the data set exhibiting the highest voltage variances from a first location to a subsequent location;a soft information calculation circuit operable to calculate soft information indicating a probability that one or more elements of a data set derived from the solid state memory device represent data originally stored to the solid state memory device; anda data decoding circuit operable to apply a data decoding algorithm to the data set derived from the solid state memory device guided by the soft information.