A method begins by a processing module determining to change storage format from a redundant array of independent disks (RAID) format to a dispersed storage network (DSN) format. The method continues with the processing module retrieving the data from a RAID memory that is stored in the RAID format to produce retrieved RAID data. The method continues with the processing module converting stripe-block data of the retrieved RAID data into a plurality of sets of encoded data slices and reprovisioning the RAID memory for storing DSN formatted data to produce reprovisioned memory. The method continues with the processing module outputting the plurality of sets of encoded data slices to at least one of the RAID memory and a DSN memory for storage therein.