US Patent 10923192 Memory system and operating method thereof

A memory system may include: a memory device including a plurality of memory blocks each having a plurality of pages; and a controller suitable for controlling the memory device to perform program operations in the pages, the memory device may check program voltage distributions of the programmed pages, and may check fail bits in the programmed pages, and the controller may confirm a partial program success in the program operations, and may perform a copy operation for first data corresponding to the partial program success, in the memory blocks.