Abstract: A memory system includes a memory device including a plurality of memory blocks each including a plurality of pages, wherein the plurality of pages each include a plurality of memory cells electrically coupled to a plurality of word lines and store write data and provide read data which are requested from a host, and a controller suitable for checking a bad page among a plurality of pages in a first memory block of the memory blocks, programming dummy data in the bad page, and process the first memory block as a normal block.

Abstract: A memory system includes a memory device including a plurality of memory blocks each including a plurality of pages, wherein the plurality of pages each include a plurality of memory cells electrically coupled to a plurality of word lines and store write data and provide read data which are requested from a host, and a controller suitable for checking a bad page among a plurality of pages in a first memory block of the memory blocks, programming dummy data in the bad page, and process the first memory block as a normal block.

Abstract: An operating method of a data storage device includes performing a read operation on a nonvolatile memory device based on a read request and a logical address from a host device, determining whether one or more physical addresses, which correspond to one or more logical addresses continuous to the logical address, are continuous to a physical address corresponding to the logical address, and prefetching data stored in a region of the nonvolatile memory device, corresponding to the one or more physical addresses, when the one or more physical addresses are determined to be continuous.