Embodiments of the present invention provide a data processing method for saving data stored within a portion of a memory associated with a first process executable by a data processing system; the method comprising the steps of: executing, substantially concurrently or substantially in parallel under control of a scheduler, a first process, with a respective execution priority, to perform a data processing task using a current portion of the memory and a backup process, having a respective execution priority, to create a back-up copy of data stored within the memory during the performance of that data processing task; the backup process being executable in response to a predeterminable event associated with the first process; and creating a back-up copy of the data in response to the predeterminable event associated with the first process.