US 2017/0256328 A1 · DYNAMIC-SHIFTING REDUNDANCY MAPPING FOR NON-VOLATILE DATA STORAGE

Abstract

Apparatuses, systems, methods, and computer program products are disclosed for redundancy mapping. A controller is configured to determine that one or more defects affect a subset of a first group of cells and a subset of a second group of cells of a non-volatile memory medium. A non-volatile memory medium may include a plurality of groups of cells, and redundant groups of cells may be available for replacing defective groups of cells. A controller is configured to store a mapping between affected subsets of first and second groups of cells and a redundant group of cells for a non-volatile memory medium. A controller is configured to read data for a first group and/or second group of cells by referencing a mapping and using a redundant group of cells.

Claims20

Dependent claims

An apparatus comprising:

a controller configured to
determine that one or more defects affect a subset of a first group of cells and a subset of a second group of cells of a non-volatile memory medium, wherein the first group and the second group are adjacent groups in the non-volatile memory medium, the non-volatile memory medium comprising a plurality of groups of cells wherein redundant groups of cells are available for replacing defective groups of cells;
determine that a contiguous region the size of one group comprises the affected subsets of the first and second groups;
store a mapping between the contiguous region and a redundant group of cells for the non-volatile memory medium;
and
read data for one or more of the first group and the second group by referencing the mapping and using the redundant group of cells.

3 more elements

Dependencies are inferred from the claim text.

Dynamic-shifting redundancy mapping for non-volatile data storage

Life of this patent

Dynamic-shifting redundancy mapping for non-volatile data storage

Life of this patent

Abstract

Claims20