Memory module including a non-volatile write cache and method for operating the memory module

A memory module comprising:

• a non-volatile write cache comprising a plurality of write cache pages for storing page data;
• a non-volatile flash storage comprising a plurality of blocks, wherein each of the plurality of blocks comprises a plurality of pages for storing page data;
• and
• a memory controller configured to:
• determine a block of the plurality of blocks which is to be erased, the block comprising one or more pages indicated as valid, each of the one or more pages storing respective page data,
• for each page of the one or more pages:
• determine, whether a write cache page of the plurality of write cache pages stores the respective page data, and in the case that it is determined that a write cache page stores the respective page data, indicate the write cache page as dirty, and
• erase the block when the write cache page is indicated as dirty.

A method for operating a memory module that comprises a remanent-polarizable memory comprising a non-volatile write cache and a non-volatile flash storage, the non-volatile flash storage comprising a plurality of blocks, wherein each of the plurality of blocks comprises a plurality of pages for storing page data, the method comprising:

• receiving page data via a memory interface, the page data being associated with a corresponding page of the plurality of pages of a block of the plurality of blocks;
• storing the page data in the non-volatile write cache within the remanent-polarizable memory;
• and
• indicating the corresponding page as invalid prior to writing the page data into the non-volatile flash storage.