Memory systems and operating methods thereof and memory controllers

A method for operating a memory system, comprising:

• in response to a memory controller entering a power-saving mode, backing up data related to a host performance boost mode in a first memory area of a buffer in the memory controller to a second memory area of the buffer, the host performance boost mode including data for communication between a memory device of the memory system and a host, wherein the first memory area is in a power-down state when the memory controller is in the power-saving mode, the second memory area is to retain the data stored in the second memory area when the memory controller is in the power-saving mode, and the data related to the host performance boost mode includes a physical address that corresponds to the memory device;
• in response to exiting the power-saving mode, restoring the data related to the host performance boost mode in the second memory area to the first memory area;
• and
• after restoration of the data related to the host performance boost mode to the first memory area, sending the data related to the host performance boost mode to the host, wherein the data related to the host performance boost mode includes an indication of validity of the physical address representative of whether data corresponding to the physical address of the memory device is the same as data corresponding to the physical address in the buffer.

A non-transitory computer-readable storage medium storing a computer program which, when executed, performs a method for operating a memory system, the method comprises:

• in response to a memory controller entering a power-saving mode, backing up data related to a host performance boost mode in a first memory area of a buffer in the memory controller to a second memory area of the buffer, the host performance boost mode including data for communication between a memory device of the memory system and a host, wherein the first memory area is in a power-down state when the memory controller is in the power-saving mode, the second memory area is to retain the data stored in the second memory area when the memory controller is in the power-saving mode, and the data related to the host performance boost mode includes a physical address that corresponds to the memory device;
• in response to exiting the power-saving mode, restoring the data related to the host performance boost mode in the second memory area to the first memory area;
• and
• after restoration of the data related to the host performance boost mode to the first memory area, sending the data related to the host performance boost mode to the host, wherein the data related to the host performance boost mode includes an indication of validity of the physical address representative of whether data corresponding to the physical address of the memory device is the same as data corresponding to the physical address in the buffer.