Storage device including migration manager, operating method thereof, and storage system including the same

A storage device for migrating data to a destination storage device, the storage device comprising:

• a memory device;
• and
• a memory controller configured to:
• generate an identification command according to a migration request received from a host,
• based on the migration request being received from the host, record, in a log table, initial states of source data corresponding to the migration request in association with address information of the source data, wherein the log table and the source data are stored in the storage device;
• transmit the identification command to the destination storage device,
• transmit first data stored in the memory device to the destination storage device according to a response signal of the destination storage device,
• based on an input/output (IO) signal being received from the host while the first data is being transmitted by the storage device to the destination storage device, the IO signal indicating an operation to generate second data based on the first data:
• store the second data in the storage device;
• and
• update the log table by:
• recording address information of the second data in association with the address information of the source data, and
• modifying the initial states in the log table that are associated with the source data used in the operation, wherein the modified states indicate which pages of the source data have been changed by the operation;
• transmit the second data to the destination storage device based on the updated log table;
• and
• transmit a migration completion signal to the host after completing transmission of the first data and the second data to the destination storage device.

A storage system comprising:

• a first storage device;
• a second storage device;
• and
• a host,
• wherein the first storage device comprises:
• a memory device;
• and
• a memory controller configured to:
• based on a migration request being received by the first storage device from the host, record, in a log table, initial states of source data corresponding to the migration request in association with address information of the source data, wherein the log table and the source data are stored in the first storage device,
• generate an identification command according to the migration request,
• transmit the identification command from the first storage device to the second storage device through the host,
• transmit first data stored in the first storage device to the second storage device through the host according to a response signal of the second storage device,
• based on an input/output (IO) signal being received by the first storage device from the host while the first data is being transmitted by the first storage device to the second storage device, the IO signal indicating an operation to generate second data based on the first data, update the log table by:
• recording address information of the second data in association with the address information of the source data, and
• modifying the initial states in the log table that are associated with the source data used in the operation, wherein the modified states indicate which pages of the source data have been changed by the operation,
• transmit the second data to the second storage device based on the updated log table, and
• transmit a migration completion signal to the host after transmission of the first data and the second data is completed, and
• wherein the first data and the second data are transmitted through the host.