Management method and device for updating underlying multi-level firmware programs using verifying controllers

An electronic device, comprising:

• controllers comprising:
• a first-level controller configured to update a first-level firmware, and write a second-level firmware to one of second-level controllers having a lower level than the first-level controller, wherein
• the one of the second-level controllers is configured to boot by performing a reset operation,
• the first-level controller or the booted second-level controller is configured to verify whether there is a target second-level controller with out-of-date firmware, and
• the first-level controller or the booted second-level controller is configured to, in response to a result of the verifying of whether there is the target second-level controller being that there is the target second-level controller, perform a firmware update on the target second-level controller by writing, the second-level firmware to the target second-level controller.

A network system, comprising:

• electronic devices;
• and
• a host configured to communicate with the electronic devices, the electronic devices comprising a first electronic device configured to receive firmware from the host and perform a firmware update, wherein
• each of the first electronic device and the host is configured to perform a firmware update by writing the firmware respectively to other electronic devices with out-of-date firmware, and
• each of the first electronic device, the firmware-updated electronic devices, and the host is configured to perform a firmware update by writing the firmware respectively to other electronic devices with out-of-date firmware.