1. A method for execution by a dispersed storage and task (DST) processing unit that includes a processor, the method comprises: generating a plurality of encoded slices of a data object by performing an encoding function on the data object; generating slice stream data that includes a plurality of mutually exclusive slice subsets of the plurality of encoded slices, wherein each of the plurality of slice subsets is assigned to a corresponding one of a plurality of storage units, and wherein the encoded slices of each slice subset correspond to contiguous segments of the data object; and generating a plurality of write requests that include the plurality of encoded slices, each for transmission to the corresponding one of the plurality of storage units indicated by the slice stream data via a network.