Memory controller, storage device including memory controller, and operating method of memory controller

A memory controller for controlling a non-volatile memory device, the memory controller comprising:

• processing circuitry configured to,
• update first meta data included in at least one of a plurality of meta data blocks based on at least one memory operation performed by the non-volatile memory device;
• generate a first journal entry including update information in response to the updating of the first meta data;
• update a recovery time based on a first journal time corresponding to the first journal entry and a coefficient determined based on a buffer memory type of a buffer memory, the first journal time based on a first journal type of a plurality of journal types corresponding to the first journal entry, each of the plurality of journal types having a different journal time, the recovery time being a predicted time for recovering the plurality of meta data blocks based on journal data including a plurality of journal entries;
• and
• perform meta writing in response to the updated recovery time reaching a threshold value, the meta writing including writing one of the plurality of meta data blocks stored in the buffer memory and the journal data to the non-volatile memory device.

An operating method of a memory controller for controlling a non-volatile memory device, the operating method comprising:

• loading a plurality of meta data blocks into a buffer memory;
• updating meta data included in at least one of the plurality of meta data blocks;
• generating a first journal entry that represents update information corresponding to the updated meta data;
• updating a recovery time based on a first journal time corresponding to the first journal entry and a coefficient determined based on a buffer memory type of the buffer memory, the first journal time based on a first journal type of a plurality of journal types corresponding to the first journal entry, each of the plurality of journal types having a different journal time, the recovery time being a predicted time for recovering the plurality of meta data blocks based on journal data including the first journal entry;
• and
• writing one of the plurality of meta data blocks to the non-volatile memory device and the journal data to the non-volatile memory device in response to the updated recovery time reaching a threshold value.