Storage device and operating method performing garbage collection of cyclical data

A data storage device comprising:

• a memory device including a plurality of memory blocks for storing system data;
• and
• a memory controller configured to control the memory device to store first system data that is cyclically provided from a host and second system data that is provided from the host in a noncyclical fashion, in an open memory block among the plurality of memory blocks for storing system data, and control the memory device to perform a garbage collection operation on the plurality of memory blocks at predetermined cycles,
• wherein the first system data includes a plurality of data slices provided from the host, and
• wherein the predetermined cycles are proportional to a common multiple of cycles of the plurality of data slices.

A method for operating a storage device including a plurality of system blocks, the method comprising:

• storing cyclic system data that is cyclically provided from a host and random system data that is provided from the host in a noncyclical fashion, in an open system block among the plurality of system blocks;
• and
• performing a garbage collection operation on the plurality of system blocks, when a size of data stored in the open system block reaches a predetermined size,
• wherein the cyclic system data includes a plurality of data slices provided for every predetermined cycle from the host, and
• wherein the predetermined size is determined based on a size of the cyclic system data provided for a period of time corresponding to a common multiple of cycles of the plurality of data slices.