Memory system monitoring data integrity and related method of operation

A nonvolatile memory system, comprising:

• a nonvolatile memory comprising a plurality of pages;
• a buffer memory configured to temporarily store user data received from an external device;
• and
• a memory controller configured to write the user data into the nonvolatile memory or transmit read data to the external device according to a request from the external device,
• wherein the memory controller comprises:
• a host interface configured to receive the user data from the external device and to store the user data received from the external device in the buffer memory;
• a memory interface configured to receive the user data stored in the buffer memory and transmit the user data received from the buffer memory to the nonvolatile memory;
• a first data check engine configured to generate write data check information based on the user data received by the host interface;
• and
• a second data check engine configured to check integrity of the user data to be transmitted to the nonvolatile memory via the memory interface based on the generated write data check information,
• wherein the memory controller is configured to transmit the user data to be transmitted to the nonvolatile memory to the nonvolatile memory where the integrity of the user data to be transmitted to the nonvolatile memory is verified according to a check result of the second data check engine.