Samsung Electronics Co., Ltd.

Seungho Song

Jeong-Eun Kim

Jungho Yun

Taehyung Kwon

A storage device includes a memory device and a solid state drive used as a cache memory for the memory device. The solid state drive includes a storage unit including a plurality of nonvolatile memory cells, a memory controller configured to control the storage unit, and a data management unit configured to manage pieces of data, stored in the storage unit, in order of less recent access time. The data management unit may set at least one of the pieces of data, stored in the storage unit, as cold data based on a data access point in time, and may send an internal trim command for the cold data to the memory controller when a valid data ratio of the storage unit is higher than a reference valid ratio. The memory controller may perform an internal trim operation on the cold data.

Growing community of inventors

Suwon-si, South Korea

Seungho Song