Storage device determining memory area to which data is written using write throughput and method of operation

A method for operating a storage device, comprising:

• determining write throughput based on a plurality of write commands received from outside of the storage device;
• determining whether the write throughput is greater than or equal to a threshold throughput;
• writing, when the write throughput is greater than or equal to the threshold throughput, target data requested from the outside into a first memory area including one or more of a plurality of first type memory blocks;
• and
• writing, when the write throughput is less than to the threshold throughput, target data requested from the outside into a second memory area including one or more of a plurality of second type memory blocks,
• wherein the first type memory blocks operate at a higher speed than the second type memory blocks,
• wherein determining the write throughput comprises:
• determining N target write commands from among the plurality of write commands;
• and
• determining the write throughput based on write performance values for the respective N target write commands,
• wherein determining the write throughput based on write performance values for the respective N target write commands comprises:
• determining an average write performance value for M target write commands from among the N target write commands;
• determining the average write performance value as the write throughput when the average write performance value is less than or equal to a maximum write performance value;
• and
• wherein the N is a natural number greater than or equal to 2 and the M is a natural number less than or equal to the N.

A controller comprising:

• a memory interface configured to communicate with a memory including a plurality of single level cell (SLC) memory blocks and a plurality of memory blocks which include multi-level cell (MLC), triple level cell (TLC) or quad level cell (QLC);
• and
• a control circuit configured to:
• determine write throughput based on a plurality of write commands received from outside of the controller,
• write data requested by the outside of the controller to one or more of the SLC memory blocks when the write throughput is greater than or equal to a threshold throughput, and
• write data requested by the outside of the controller to one or more of the memory blocks which include MLC, TLC or QLC when the write throughput is less than the threshold throughput,
• wherein the control circuit is configured to determine the write throughput based on write performance values for respective N target write commands selected from among the plurality of write commands,
• wherein the control circuit is configured to determine an average write performance value for M target write commands from among the N target write commands and to determine the average write performance value as the write throughput when the average write performance value is less than or equal to a maximum write performance value, and
• wherein the N is a natural number greater than or equal to 2 and the M is a natural number less than or equal to the N.