The invention relates to a data organization method of a disk array, which belongs to the data organization method of the storage system of a computer and is used for lowering the energy consumption of an RAID10 disk array. The invention solves the problems of single-point failure, performance bottleneck, extra hardware expense and no further lowering of the energy consumption of a disk storage system existing in a traditional fixed log method and a traditional centralized type synchronous process method. In the invention, the data organization method sequentially comprises the steps of writing write operation request data into a master disk, judging the occupation quantity of an on-duty log space, selecting an on-duty log disk and writing the write operation request data into the on-dutylog disk. The invention uses all mirror image disks in the RAID10 disk array as log disks, eliminates the single-point failure, the performance bottleneck and the extra hardware and energy consumption expense which are brought by the traditional fixed log method and the traditional centralized type synchronous method, and also further lowers the energy consumption of the disk storage system.