Storage device and method of operating storage device

A memory device comprising:

• a memory cell array including a plurality of nonvolatile memory cells;
• a page buffer circuit configured to temporarily store sensing data sensed from the plurality of nonvolatile memory cells;
• and
• a control logic circuit configured to write or sense data in or from the plurality of nonvolatile memory cells in response to a command received from an external device that is external to the memory device,
• wherein the control logic circuit is configured to:
• store each of a plurality of first pattern data in the page buffer circuit in response to a training command received from the external device;
• generate a plurality of second pattern data based on a seed;
• and
• output a result of comparing each of the plurality of first pattern data with a respective one of the plurality of second pattern data.

A method of a storage device, the method comprising:

• receiving, at a memory device, a first training command and first pattern data from a memory controller;
• generating, at the memory device, second pattern data based on a seed, in response to the first training command;
• generating, at the memory device, a first comparison result of comparing the first pattern data and the second pattern data;
• and
• outputting, at the memory device, comparison data based on the first comparison result.