A method for use by a source storage unit of a dispersed storage network includes identifying a slice name corresponding to a slice to migrate from a source storage unit to a destination storage unit; sending the slice to migrate to the destination storage unit; generating a slice verification request and sending the slice verification request to the destination storage unit; receiving an integrity value from the destination storage unit; and determining when the integrity value compares favorably to the slice verification request. When the source storage unit determines that the integrity value compares favorably to the slice verification request, a slice name assignment associated with the slice name is updated and the slice is deleted from the source storage unit.