Storage device including out-of-band management controller and system and operation method thereof

A storage system comprising:

• a host device including
• a power managing module configured to provide a power supply voltage and
• a baseboard management controller (BMC) configured to collect state information about the power managing module;
• and
• a storage device including
• a storage controller configured to perform a data processing operation based on a command from the host device,
• an out-of-band management controller (OMC) configured to
• detect an error of the power supply voltages provided by the storage controller and the power managing module through a first-type bus while performing the data processing operation based on the command from the host device and during an operating period of the storage device,
• generate self-monitoring data indicating state information on the power supply voltage, during the operating period of the storage device, based on detection of the error of the power supply voltage,
• request, from the BMC during the operating period of the storage device, real-time state information on the power supply voltage provided by the power managing module, the request transmitted through a second-type bus that is different from the first-type bus, and
• compare the self-monitoring data and the real-time state information and generate result data for-indicating whether the error of the power supply voltage is caused by the host device in response to receiving the real-time state information from the BMC through the second-type bus.

A storage device comprising:

• a storage controller configured to perform a data processing operation with an external host device through a first-type bus;
• and
• an OMC configured to
• monitor a power supply voltage received from the external host device,
• generate first log data indicating state information on the power supply voltage received from the external host device based on detecting an error of the power supply voltage during an operating period of the storage device,
• request, based on the OMC being operated as a master device, second log data indicating real-time state information on the power supply voltage during the operating period of the storage device from the external host device through a second-type bus that is different from the first-type bus,
• determine a cause of the error of the power supply voltage based on comparing the first log data and the second log data, and
• transmit result data to the external host device in response to the error of the power supply voltage being caused by the external host device, the result data generated by comparing the first log data and the second log data.