Memory system and method for generating a checkpoint of a memory device

A memory system, comprising:

• a non-volatile memory device configured to store respective page data for each page of a plurality of pages;
• a non-volatile first in first out (FIFO) buffer;
• a memory controller configured to carry out a checkpoint operation in response to receiving a checkpoint command for generating a checkpoint of the non-volatile memory device;
• a non-volatile storage device for persistent data storage, the non-volatile memory device and/or the non-volatile storage device being configured to store a page table comprising a respective page table entry for each page of the plurality of pages, the respective page table entry of a respective page indicating a respective physical address of the memory and indicating whether the respective page was updated after receiving the checkpoint command;
• wherein the checkpoint operation comprises:
• generating a page table copy by copying the page table;
• and, in response to receiving data that are to be written to a page of the plurality of pages, and in the case that, in the page table copy, the respective page table entry of the page indicates that the page was not updated after receiving the checkpoint command:
• storing the data in the non-volatile FIFO buffer,
• generating a page data copy by copying the respective page data of the page to a further physical address of the non-volatile memory device different from the respective physical address, and
• merging the data stored in the non-volatile FIFO buffer with the page data copy.