POST-WRITE READ IN NON-VOLATILE MEMORIES USING COMPARISON OF DATA AS WRITTEN IN BINARY AND MULTI-STATE FORMATS

摘要

Techniques for a post-write read are presented. In an exemplary embodiment, host data is initially written into the non-volatile memory in binary form, such as a non-volatile binary cache. It is then subsequently written from the binary section (410) into a multi-state nonvolatile section (420) of the memory. After being written in multi-state format, pages of data from a multi-state block can then be checked against there source pages in the binary section to verify the quality of the multi-state write. This process can be performed on the memory device itself, without transferring the pages out to the controller.