The embodiment of the invention discloses a data writing method which is used for improving the writing speed of data. The method comprises the steps of sending a first instruction to second equipment, wherein the first instruction is used for indicating the second equipment to reserve a first memory space of first data; sending a second instruction and a third instruction to the second device, with the second instruction carrying the first data, the second instruction being used for instructing to write the first data in the first memory space, and the third instruction being used for instructing to reserve a second memory space of the second data; sending a fourth instruction and a fifth instruction to the second device, with the fourth instruction being used for indicating to write thefirst data into a preset first hard disk space after the integrity of the first data is verified successfully, the fifth instruction carrying the second data, and the fifth instruction being used forindicating to write the second data into a second memory space; and sending a sixth instruction to the second device, wherein the sixth instruction is used for indicating that the second data is written into a preset second hard disk space after the integrity of the second data is verified successfully.