Data processing method and related storage device

A storage device, comprising:

• an interface for communicating with a target storage device;
• and
• a processor coupled to the interface and configured to:
• receive a first reservation preemption command from a host via a target port, wherein the first reservation preemption command comprises a port identifier of the target port of the host, a to-be-checked reservation key, and a logical unit number (LUN) of a target logical unit (LU), and wherein the to-be-checked reservation key enables the target storage device to check the target port that sends the first reservation preemption command from the host;
• determine a forwarding port of the storage device that corresponds to the target port based on a preset port mapping relationship, wherein the preset port mapping relationship comprises a mapping relationship between the target port and the forwarding port;
• encapsulate the to-be-checked reservation key, the LUN, the port identifier of the target port, and a port identifier of the forwarding port to obtain a second reservation preemption command;
• and
• send the second reservation preemption command to the target storage device using the forwarding port, wherein the target storage device comprises the target LU, wherein the second reservation preemption command instructs the target storage device to perform a reservation preemption operation based on checking a stored reservation key in reservation registration information of the target LU against the to-be-checked reservation key, and wherein the reservation registration information comprises a one-to-one correspondence between the target port and the stored reservation key.

A data processing system, comprising:

• a first storage device;
• a second storage device coupled to the first storage device;
• and
• a host coupled to the first storage device and the second storage device and configured to send a first reservation preemption command to the first storage device via a target port of the host, wherein the first reservation preemption command comprises a port identifier of the target port, a to-be-checked reservation key, and a logical unit number (LUN), and wherein the to-be-checked reservation key enables the second storage device to check the target port that sends the first reservation preemption command from the host,
• wherein the second storage device is configured to:
• receive a second reservation preemption command from the first storage device;
• determine a target logical unit (LU) corresponding to the LUN;
• search reservation registration information stored in the target LU for a target reservation key corresponding to the target port;
• and
• perform a reservation preemption operation based on checking a stored reservation key in reservation registration information of the target LU against the to-be-checked reservation key when the to-be-checked reservation key is consistent with the target reservation key, and wherein the reservation registration information comprises a one-to-one correspondence between the target port and the stored reservation key.