Memory controller and method of operating the same

A storage device, comprising:

• a memory device including a plurality of memory blocks, each memory block being configured to store a plurality of data pages;
• and
• a memory controller in communication with the memory device and configured to generate valid page information related to valid data page counts among the plurality of data pages in memory blocks of the plurality of memory blocks, make a determination, based on the valid page information, whether the storage device is in a sustain state or a transition state, and control a throttling operation for managing a quality of service based on the determination.

A storage device, comprising:

• a memory device including a plurality of memory blocks, each memory block being configured to store a plurality of data pages;
• and
• a memory controller in communication with the memory device and configured to generate first information related to valid data page counts among the plurality of data pages in memory blocks of the plurality of memory blocks, generate second information related to a level of random write performance of the storage device based on the first information, and control a latency of a response to a write request received from a host based on the second information.

A storage device, comprising:

• a memory device including a plurality of memory blocks, each memory block being configured to store a plurality of data pages;
• and
• a memory controller in communication with the memory device and configured to generate garbage collection information including valid page count values of victim blocks on which garbage collection is to be performed among the plurality of memory blocks, and manage a quality of service for a host based on the garbage collection information.