Abstract: 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 into a multi-state non-volatile section 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.

Abstract: A storing apparatus, equipped with a control unit configured to control the writing of data into a memory and to communicate a notice to an external device with a communication unit if the remaining amount of substitute blocks becomes equal to or less than a threshold value specified by stored threshold value information, includes the control unit configured to change the threshold value information, used for the notice communicated by the control unit, by the use of threshold value information received from the external device with the communication unit.