US Patent 11409473 Data storage device and operating method thereof

A data storage device includes a nonvolatile memory device which includes a first nonvolatile memory group including a plurality of first nonvolatile memories coupled to a first flash translation layer (FTL) core and a second nonvolatile memory group including a plurality of second nonvolatile memories coupled to a second FTL core, and a controller including the first FTL core configured to write first user data transmitted from the host device and second metadata related to second user data in one among the plurality of first nonvolatile memories and a common memory.