Storage device, for allocating physical space for logical address before receiving write request, operating method thereof, and storage system including the same

Abstract

Disclosed is a storage device, which include a non-volatile memory device including a plurality of memory blocks, a buffer memory, and a storage controller that receives a first allocation request and first logical address information from a host, allocates logical addresses of the first logical address information to a first physical group of the plurality of memory blocks in response to the first allocation request, receives a first write request and first write data associated with the first logical address information, stores the first write data in the buffer memory, and writes the first write data stored in the buffer memory in memory blocks of the first physical group in response to the first write request. The first allocation request precedes the first write request.