An electronic device is provided including an input/output (I/O) interface, a plurality of memory elements, a controller coupled to the I/O interface and the plurality of memory elements. In the device, the controller configured for operating the plurality of memory elements during a normal operating mode of the electronic device, where responsive to receiving a command for replacing a selected memory sector in the electronic device during the normal operating mode, the controller is configured for identifying one or more available spare memory sectors in the electronic device and modifying at least one memory map in the electronic device to replace the selected memory sector with the one of the available spare memory sectors.