Samsung Electronics Co., Ltd.

Lucius Yun

Shin-Ho Oh

A nonvolatile memory device includes a memory area having free segments and first to fourth regions having used segments. The garbage collection method includes selecting a target segment from the used segments, moving a valid data block from the selected target segment to the used segments, and erasing data of all data blocks in the selected target segment and making the selected target segment into a free segment. When the number of free segments is greater than a predefined value, the target segment is selected by a first method and valid data blocks in the target segment are moved by a second method. When the number of free segments is less than the predefined value, the target segment is selected by a third method and valid data blocks in the target segment are moved by a fourth method.

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Hwaseong-si, South Korea

Lucius Yun