Storage device performing copy operation in background and operating method thereof

A storage device comprising:

• at least one nonvolatile memory device configured to store or read data;
• and
• a controller configured to control the at least one nonvolatile memory device and to execute a command provided from a host device,
• wherein the controller is configured to at least:
• before receiving a first copy command:
• receive, from the host device, an identify command requesting a controller data structure;
• based on the identify command, transmit, to the host device, the controller data structure indicating that a copy command is supported and a background copy is supported;
• posting a completion queue entry associated with the identify command to a completion queue of the host device;
• based on the controller data structure indicating that the copy command and the background copy are supported, receive, from the host device, a first logical address of at least one source range entry, a second logical address of one destination range entry, and the first copy command including a first flag that indicates the background copy is set;
• map a first physical address on the second logical address based on the first copy command;
• map a second physical address on at least one of the second logical address and the first physical address;
• transmit a first notification of a completion of the first copy command to the host device;
• after the first notification is transmitted, read first data stored at the first physical address;
• and
• write the first data at the second physical address.

A storage device comprising:

• at least one nonvolatile memory device configured to store or read data;
• and
• a controller configured to control the at least one nonvolatile memory device and to execute a command provided from a host device,
• wherein the controller is configured to at least:
• before receiving a copy command:
• receive, from the host device, an identify command requesting a controller data structure;
• based on the identify command, transmit, by the controller to the host device, the controller data structure indicating that a copy command is supported and a background copy is supported;
• post a completion queue entry associated with the identify command to a completion queue of the host device;
• based on the controller data structure indicating that the copy command and the background copy are supported, receive the copy command including a flag indicating that the background copy is set, from the host device;
• based on the copy command, update a mapping table in which logical addresses and physical addresses are mapped in a one-to-one correspondence;
• after updating the mapping table, transmit a complete notification of the copy command to the host device;
• and
• after transmitting the complete notification, control the at least one nonvolatile memory device to perform data read operations or data write operations corresponding to the copy command.