1. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises: receiving data in a redundant array of independent disks (RAID) format; converting from the RAID format to an original format of the data; dispersed storage error encoding a data segment of the data in the original format to produce a set of encoded data slices, wherein the set of encoded data slices includes a decode threshold sub-set of encoded data slices and an error correcting sub-set of encoded data slices; converting the decode threshold sub-set of encoded data slices into a RAID formatted data segment; storing the RAID formatted data segment in RAID memory; and storing at least the error correcting sub-set of encoded data slices in DSN memory.