1. A computing device comprising: an interface configured to interface and communicate with a dispersed storage network (DSN); memory that stores operational instructions; and a processing module operably coupled to the interface and to the memory, wherein the processing module, when operable within the computing device based on the operational instructions, is configured to: detect a change from a first system configuration of a Decentralized, or Distributed, Agreement Protocol (DAP) to a second system configuration of the DAP based on a storage unit to be replaced (SUTBR) within a plurality of storage units (SUs) within the DSN, wherein the first system configuration of the DAP and the second system configuration of the DAP respectively provide for deterministic calculation of locations of encoded data slice (EDS) sets that correspond respectively to a plurality of data segments of a data object that are distributedly stored across the plurality of storage units (SUs) within the DSN, wherein the data object is segmented into the plurality of data segments, wherein a data segment of the plurality of data segments is dispersed error encoded in accordance with dispersed error encoding parameters to produce a set of EDSs of the EDS sets that is of pillar width having a plurality of EDS names, wherein a read threshold number of EDSs of the set of EDSs provides for reconstruction of the data segment, wherein a write threshold number of EDSs of the set of EDSs provides for a successful transfer of the set of EDSs from a first at least one location in the DSN to a second at least one location in the DSN, wherein the data object is associated with a unique source name, and wherein each EDS name of the plurality of EDS names includes a reference to the unique source name; direct the SUTBR to transfer a plurality of EDSs stored within the SUTBR to a replacement storage unit (RSU) for storage within the RSU; during transfer of the plurality of EDSs from the SUTBR to the RSU: direct the plurality of SUs to operate based on the first system configuration of the DAP; and direct the SUTBR to service read requests and write requests from one or more other computing devices for at least one EDS of the plurality of EDSs based on the first system configuration of the DAP; and when the plurality of EDSs have been successfully transferred from the SUTBR to the RSU: direct the plurality of SUs to operate based on the second system configuration of the DAP; and direct the RSU to service read and write requests from the one or more other computing devices for the at least one EDS of the plurality of EDSs based on the second system configuration of the DAP.