Subject matter disclosed herein relates to a memory device, and more particularly to a nonvolatile memory device having a recess structure and methods of fabricating same. For example, the multi-system set configuration may include a first system set that is generally configured to act as an \u201cactive\u201d set, a second system set that is configured to operate when the first system set is non-operational or in an \u201cidle\u201d state, and a third system set that is configured to operate when the first and second system sets are non-operational. Using the operation result, the operation result by the first error detection code operation is updated, thereby simultaneously performing ECC processing and EDC processing for the target code strings which are inputted in a discontinuous arrangement. A detention portion is provided on the canceler for preventing the stop ring from falling out of position.