A system and method for synchronizing firmware revisions in redundant controllers in a storage system is disclosed. Redundant controllers transmit firmware revision numbers during the establishment of a communication links between the controllers. The revision numbers are compared and, if they are not equal, then controller that possesses the more recent firmware revision transmits its firmware across the communication link to the other controller. The more recent firmware is stored in the memory of the other controller, which is then re-booted to ensure that both controllers are operating with the same firmware. If a failed controller is replaced or rebooted while the other controller remains operational, then the firmware revision from the operational controller is transmitted to the replaced or re-booted controller and stored in its memory. The controller is then re-booted to ensure that both controllers are operating with the same firmware.