13189402

Paragraph Number

213

In another embodiment, the adjustment module 408 uses a search algorithm to determine the read voltage threshold based on the direction of deviation. For example, the range of voltages in the direction of deviation from the current read voltage threshold may be the search space for the search algorithm. The adjustment module 408, in one embodiment, may use a linear search, a binary search, or the like to determine the read voltage threshold. To check each step as part of the search algorithm, the data set read module 402 may re-read the data set in response to each adjustment, and the deviation module 404 may re-determine whether the read bias of the re-read data set deviates from the known bias. The direction module 406 may re-determine a direction of deviation for the re-read data set to further the search. The adjustment module 408 may iteratively readjust the read voltage threshold based on the re-determined direction of deviation until the deviation module 404 determines that the read bias of a re-read data set does not deviate from the known bias, or until each of the read voltage threshold level has been tested, and/or until the data set can be corrected using ECC checkbits, or the like.

Added by DJM 3 2021