Storage device, electronic device including storage device, and operating method of electronic device

An electronic device comprising:

• at least one processor;
• a first storage device and a second storage device each including a buffer memory and a nonvolatile memory device;
• and
• a root complex configured to electrically connect the at least one processor, the first storage device, and the second storage device,
• wherein each of the first storage device and the second storage device is configured to:
• in response to a command of a first packet format received from the at least one processor through the root complex, access the nonvolatile memory device by using the buffer memory;
• and
• in response to a command of a second packet format received from the at least one processor through the root complex, access the buffer memory without accessing to the nonvolatile memory device.

An operating method of an electronic device which includes at least one processor, a first storage device, a second storage device, and a root complex, the method comprising:

• assigning, at the at least one processor, a first task and a second task to the first storage device and the second storage device through the root complex based on a first packet format, respectively;
• monitoring, with the at least one processor, a computational utilization rate of the first storage device and a computational utilization rate of the second storage device through the root complex;
• when a difference between the computational utilization rate of the first storage device and the computational utilization rate of the second storage device is greater than a first threshold value, instructing, by the at least one processor, to balance the first storage device and the second storage device through the root complex based on a second packet format;
• and
• performing, at the first storage device and the second storage device, a balancing through the root complex without passing through the at least one processor.