Alibaba Group Holding Limited
System and method for facilitating improved utilization of NAND flash based on page-wise operation

Abstract:

The system receives a request to write data to a non-volatile memory comprising blocks with a plurality of wordlines, wherein a respective wordline is coupled to a plurality of pages across a plurality of cells, and wherein the pages are ordered by an increasing number of programmable bits per cell. In response to determining that the data is not an updated version of data stored in the non-volatile memory, the system writes the data to a first ordered page of a plurality of pages corresponding to a next available wordline. In response to determining that the data is an updated version of existing data stored in the non-volatile memory, the system writes the data to a next available ordered page corresponding to an existing wordline in which the existing data is stored.