Memory system, data processing system and operation method of the same

An operation method of a memory system, comprising:

• acquiring error bit information of a plurality of pages in each of specific memory blocks among a plurality of memory blocks of a memory device;
• generating a memory block group management list of each of the specific memory blocks to classify the specific memory blocks into different memory block groups or a same memory block group based on the error bit information;
• and
• performing a test read operation on the plurality of pages in each of the plurality of memory blocks based on whether the specific memory blocks are classified into different memory block groups or the same memory block group,
• wherein the generating of a memory block group management list includes:
• comparing the error bit information of each of the specific memory blocks to each of the other specific memory blocks, and calculating an error bit information matching ratio of each of the plurality of pages in each of the specific memory blocks;
• comparing each error bit information matching ratio with a reference error bit information matching ratio;
• and
• classifying the specific memory blocks into different memory block groups or the same different memory block group based on a comparison result.

A data processing system, comprising:

• a host suitable for generating read data and a read command;
• and
• a memory system comprising:
• a memory device including a plurality of blocks, each block having a plurality of pages;
• and
• a controller suitable for selecting specific memory blocks among the plurality memory blocks, acquiring error bit information of the plurality of pages in each of the specific memory blocks, generating a memory block group management list of each of the specific memory blocks to classify the specific memory blocks into different memory block groups or a same memory block group based on the error bit information, and performing a test read operation on the plurality of pages in each of the plurality of memory blocks based on whether the specific memory blocks are classified into different memory block groups or the same memory block,
• wherein the memory block group management list includes a group identification, a group count and an error bit information matching ratio of each of the specific memory blocks,
• wherein, when the specific memory blocks are classified in different memory block groups, the group identification is set to reflect the different memory block groups, and when the specific memory block is classified in the same memory block group, the group count reflects a number of the specific blocks in the same memory block group.