Data storage device and operating method thereof

An operating method of a controller which includes a flash translation layer (FTL) and a flash interface layer (FIL) to control an operation of a nonvolatile memory device, the operating method comprising:

• requesting, by the FIL, a read count address to the FTL, the read count address indicating an address of a memory region in which read count data including a read count value of a first data storage region on which a read operation has been performed, among a plurality of data storage regions included in the nonvolatile memory device, is stored;
• transferring, by the FTL, the read count address to the FIL according to the request of the FIL;
• and
• updating, by the FIL, the read count value of the first data storage region based on the read count address received from the FTL.

A memory system comprising:

• a memory device configured to perform a read operation on a read-target region;
• a memory configured to load a read count table having fields of a read count address, an address of the read-target region and a read count of the read-target region;
• an interface configured to provide a request including information of the address of the read-target region;
• and
• a control logic configured to provide, in response to the request, the interface with information of the read count address corresponding to the information of the address of the read-target region,
• wherein the interface updates information of the read count of the read-target region corresponding to the information of the read count address, and
• wherein the control logic controls the memory device to perform a read reclaim operation to the read-target region according to the information of the read count of the read-target region.