Sandisk Technologies Inc.

Sachin Krishne Gowda

Sateesh Desireddi

Manuel Antonio d'Abreu

Stephen L Skala

Jayaprakash Naradasi

Anand Venkitachalam

Nagi Reddy Chodem

Devices and methods implemented therein in are disclosed for correcting errors in data. The method comprises determining that a first copy of data and a second copy of data include errors uncorrectable by an error correction code (ECC) engine. The ECC engine is modified based on determining that the first copy of data and the second copy of data include errors uncorrectable by the ECC engine and using the modified ECC engine, the first copy of data and the second copy of data are processed to correct the errors in the first and second copy of the data.

Approach to correct ECC errors using duplicate copies of data

A data storage device includes non-volatile memory and a controller. The controller is configured to read first data from the non-volatile memory. The first data indicates a first count of storage elements of the group that have a first activation status when sensed with a first reference voltage at a first time. The controller is configured to read second data from the non-volatile memory. The second data indicates a second count of storage elements of the group that have the first activation status when sensed with the first reference voltage at a second time. The controller is configured to generate an updated first reference voltage at least partially based on a difference between the first count and the second count and based on one or more parameters corresponding to a distribution of threshold voltages of storage elements at the first time.

Systems and methods to update reference voltages of non-volatile memory

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Hassan, India

Sachin Krishne Gowda