A method includes receiving, from a user device, a data object for storage. The method further includes determining dispersed storage error encoding parameters for the data object based on the virtual storage vault. The method further includes determining to adjust the pillar width number based on activation status of storage units in the set of storage units and others. When it is determined to adjust the pillar width number, adjusting the pillar width. The method further includes dispersed storage error encoding the data object in accordance with the decode threshold number, the encoding function, and the adjusted pillar width number. The method further includes sending a subset of encoded data slices from each of the sets of encoded data slices to active storage units of the set of storage units and sending an encoded data slice from each of the sets of encoded data slices to an active storage unit.