Storage device, an operation method of a storage system including the storage device in which data stored in apinned buffer area and a non-pinned buffer area is flushed according to a flush request/policy, and a host device controlling the storage device

Abstract

A storage device including: a nonvolatile memory device including a first, second and third area; and a controller to receive a first write command including a first logical block address from a host, to receive first data corresponding to the first logical block address in response to the first write command, and store the first data in the nonvolatile memory device, when the first write command includes area information, the controller stores the first data in the first area or the second area based on the area information, when the first write command does not include the area information, the controller stores the first data in the third area, each of the first area and the second area includes memory cells each storing 'n' bits (n being a positive integer), and the third area includes memory cells each storing 'm' bits (m being a positive integer greater than n).