Storage device, and host-storage system including the storage device

A storage device, comprising:

• a first storage device that stores a first original data of an original data set that includes the first original data to a fourth original data and a first parity data;
• and
• a second storage device that stores the second original data and a second parity data that differs from the first parity data,
• wherein the first storage device computes the second original data received from the second storage device and the first parity data, and restores the third original data, and
• wherein the second storage device transmits the second original data simultaneously to the first storage device and a host.

A host-storage system, comprising:

• a host;
• a storage device that includes a first storage device that stores a first data and a second storage device that stores a second data;
• and
• a host interface that connects the host and the storage device,
• wherein the host transmits a read command to the first storage device and the second storage device,
• wherein the first storage device transmits a third data that is at least a part of the first data simultaneously to the host and the second storage device in response to the read command, and
• wherein the second storage device executes a computation that uses the third data received from the first storage device and the second data.