Storage device performing atomic write, host controlling storage device, and operating method of storage device

An operating method of a storage device communicating with a host and comprising a non-volatile memory and a volatile memory, the operating method comprising:

• receiving a new data and append data write command from the host;
• writing the new data and the append data to at least one of the non-volatile memory and the volatile memory;
• receiving, from the host, a remap command comprising mapping information between old data and the new data and a first identification (ID);
• based on the remap command, storing, in the volatile memory, the mapping information between the old data and the new data and the first ID;
• receiving, from the host, a metadata write command requesting writing metadata, wherein the metadata is associated with the append data and the metadata write command comprises the first ID;
• and
• in response to the metadata write command, updating the mapping information between the old data and the new data, and writing the metadata.

A storage device comprising:

• a memory device;
• and
• a storage controller configured to:
• receive a new data and append data write command from a host,
• based on the write command, write the new data and the append data to the memory device,
• receive, from the host, a remap command comprising mapping information between old data and the new data and a first identification (ID),
• based on the remap command, store the mapping information between the old data and the new data and the first ID in a memory inside the storage controller, and
• receive, from the host, a metadata write command requesting writing metadata, wherein the metadata is associated with the append data and the metadata write command comprises the first ID, and
• based on the metadata write command, update the mapping information between the old data and the new data, and write the metadata to the memory device.