1. A method for a computer of a dispersed storage network to convert data stored in a redundant array of independent disks (RAID) format into data in a dispersed storage error encoded format, the method comprises: receiving the data for storage; interpreting the data to identify sets of RAID data blocks and corresponding RAID parity blocks; and for a set of RAID data blocks and a corresponding RAID parity block: converting format of the data from the RAID format to the dispersed storage error encoded format by: reconstructing a portion of the data from the at least some of the RAID data blocks of the set of RAID data blocks and, when needed, the corresponding RAID parity block; generating a data matrix of the portion of the data; generating a set of encoded data slices by encoding the data matrix using an encoding matrix in accordance with error coding dispersal storage function parameters, wherein the set of encoded data slices includes a total number of encoded data slices, wherein the portion of the data is recoverable from a threshold number of encoded data slices of the set of encoded data slices, and wherein the threshold number is at least two less than the total number; and outputting the set of encoded data slices to a set of storage units of a dispersed storage network (DSN) memory for storage therein.