A method and technique are provided for providing a service address space. The method includes providing a service co-processor with a service address space attached to a main processor. The main processor is provided with a main address space, and the service address space and the main address space include a full range of memory available to the respective service-co-processor and the main processor. The service co-processor creates and maintains an independent copy of the main address space in the form of the service address space. The service address space is updated by receiving storage delta packets from the main processor and applying the storage delta packets to the service address space.