Memory system and operation method thereof

A method for operating a memory system, comprising:

• loading a first table regarding logical-to-physical (L2P) map information for data stored in a non-volatile memory device;
• receiving a write request and a data group input from a host, wherein the data group includes plural data pieces to be collectively programmed in the non-volatile memory device;
• generating new L2P map information regarding the data group;
• copying at least one L2P map information from the first table, which corresponds to at least one of the plural data pieces included in the data group, to a second table before the at least one of plural data pieces is programmed in the non-volatile memory device before reception of the plurality of the data of the data group is committed;
• and
• updating the preceding L2P map information in the first table with the new L2P map information after the preceding L2P map information is copied to the second table regardless of the reception of the plurality of the data of the data group is committed.

A memory system, comprising:

• a non-volatile memory device storing data;
• and
• a controller coupled to the non-volatile memory device and configured to control read, program or erase operations, the controller storing a first table in a volatile memory device, wherein the first table includes logical-to-physical (L2P) map information for the data stored in the non-volatile memory device,
• wherein the controller receives a data group, including plural data pieces, input from a host, and programs the data group in the non-volatile memory device collectively, and
• wherein the controller is configured to generate new logical-to-physical (L2P) map information regarding the data group, copy at least one L2P map information from the first table, which corresponds to at least one of the plural data pieces in the data group, to a second table before reception of the plurality of the data of the data group is committed and update the preceding L2P map information in the first table with the new L2P map information after the preceding L2P map information is copied to the second table regardless of the reception of the plurality of the data of the data group is committed.