Memory system, memory controller and method for operating memory controller

A memory controller comprising:

• a memory interface configured to communicate with a nonvolatile memory set including at least one nonvolatile memory;
• and
• a control circuit configured to:
• control the nonvolatile memory set;
• write data to a memory block in a target memory block pool in the nonvolatile memory set during a target time period between a time at which an operation mode for the nonvolatile memory set is changed from a second operation mode to a first operation mode and a time at which a command including information indicating that a host expects a requested operation to be performed in the first operation mode is received from the host;
• prevent execution of a background operation for the nonvolatile memory set when the operation mode is the first operation mode;
• and
• control a background operation for the nonvolatile memory set to be executable when the operation mode is the second operation mode.

A method for operating a memory controller suitable for controlling a nonvolatile memory set including at least one nonvolatile memory, the method comprising:

• changing an operation mode for the nonvolatile memory set from a second operation mode to a first operation mode;
• receiving, from a host, a command including information indicating that the host expects a requested operation to be performed in the first operation mode;
• writing data to a memory block in a target memory block pool in the nonvolatile memory set during a target time period between a time at which an operation mode for the nonvolatile memory set is changed from a second operation mode to a first operation mode and a time at which a command including information indicating that a host expects a requested operation to be performed in the first operation mode is received from the host;
• preventing execution of a background operation for the nonvolatile memory set when the operation mode is the first operation mode;
• and
• controlling a background operation for the nonvolatile memory set to be executable when the operation mode is the second operation mode.