Method for assigning plurality of channels of storage device for stream data writing, storage device and storage medium

A storage device, comprising:

• a plurality of memory chips;
• and
• a controller, coupled to the plurality of memory chips through a plurality of channels, for processing stream data writing for a plurality of streams, wherein the controller is configured to perform a plurality of operations comprising:
• (a) providing global available channel status data and stream suitable channel status data for one of the plurality of streams, wherein the global available channel status data indicates whether each of the channels has been assigned for stream data writing, and the stream suitable channel status data indicates whether each of the plurality of channels has been assigned for stream data writing for the one of the plurality of streams;
• (b) generating stream available channel status data for the one of the plurality of streams, based on the global available channel status data and the stream suitable channel status data for the one of the plurality of streams, wherein the stream available channel status data for the one of the plurality of streams indicates whether each of the channels is available for stream data writing for the one of the plurality of streams;
• (c) selecting at least one available channel according to the stream available channel status data;
• (d) updating the global available channel status data with respect to the at least one available channel selected to indicate that the at least one available channel selected has been assigned for stream data writing;
• and
• (e) updating the stream suitable channel status data for the stream with respect to the at least one available channel selected to indicate that the at least one available channel selected has been assigned for stream data writing for the one of the plurality of streams.