Storage system and method for processing data operation request

A storage system, wherein the storage system is a storage system that has a write once read many (WORM) function, and comprises:

• a storage device configured to store data;
• and
• a controller, comprising:
• a real-time clock (RTC) configured to provide system time for the storage system;
• a reference clock configured to verify the system time of the storage system and provided with an external access interface, wherein the reference clock is controlled by a board management controller (BMC) through the external access interface with which the reference clock is provided, and wherein the reference clock cannot be modified when the storage system is running;
• the BMC configured to read a value of a time register of the reference clock to obtain time of the reference clock;
• and
• a processor configured to:
• receive a data operation request sent by an application server, wherein the data operation request is used to change the data stored in the storage device;
• read a value of a time register of the RTC to obtain time of the RTC;
• obtain the time of the reference clock through a communication channel between the BMC and a southbridge chip;
• acquire a time difference between the RTC and the reference clock based on the time of the RTC and the time of the reference clock;
• determine whether the time difference is greater than an accumulated time precision error of the reference clock;
• and
• refuse to execute the data operation request when the time difference is greater than the accumulated time precision error.