Swtiching controller, storage device and computing system for improving difference of access latency between memories

A switching controller comprising:

• at least one buffer memory;
• a buffer memory control module configured to select data stored in at least one of a plurality of storage blocks included in each of a plurality of memories and to store the selected data into the at least one buffer memory, or delete data stored in the at least one buffer memory, based on a command for a predetermined period by a plurality of external devices;
• and
• a routing module configured to transmit the command by the plurality of external devices to the plurality of memories or the at least one buffer memory.

A computing system comprising:

• a plurality of external devices;
• and
• a storage device including a buffer memory and comprising a plurality of memories and a switching controller for communicating with the plurality of memories and transmitting a command input by the plurality of external devices to at least one of the plurality of memories;
• wherein entire data of a storage block included in at least one of the plurality of memories is stored in the buffer memory based on a command input to the storage device by a first external device of the plurality of external devices, and a part of the entire data stored in the buffer memory is transmitted to a second external device through the switching controller according to a command input to the storage device by the second external device.