Storage device for managing map data, computing device including storage device for managing map data and memory device, and operating method of computing device

A storage device comprising:

• a nonvolatile memory;
• an internal buffer memory;
• and
• a storage controller configured to control the nonvolatile memory and the internal buffer memory, to communicate with an external bus, and to communicate with an external processor through the external bus, the external processor being configured to directly communicate with a plurality of memory devices,
• wherein the nonvolatile memory includes user data and map data,
• wherein the map data includes a plurality of address pairs in which logical block addresses are mapped to physical block addresses,
• wherein, in an initialization operation, the storage controller outputs the map data to an external memory through the external bus based on a peer-to-peer manner without control of the external processor through the external bus, and
• wherein, after the initialization operation, the storage controller receives partial map data of the map data from the external memory through the external bus based on the peer-to-peer manner without control of the external processor through the external bus, and stores the partial map data in the internal buffer memory.

An operating method of a computing device which includes a processor, a storage device, a memory, and a plurality of memory devices configured to directly communicate with the processor, the method comprising:

• sending, at the storage device, map data stored in a nonvolatile memory of the storage device to the memory through a bus based on a peer-to-peer manner without control of the processor;
• reading, at the storage device, partial map data of the map data from the memory through the bus based on the peer-to-peer manner without control of the processor and storing the partial map data in an internal buffer memory of the storage device;
• and
• executing, at the storage device, a command that is transferred through the bus from the processor connected with the bus, based on one of the map data present in the memory and the partial map data present in the internal buffer memory.