Raid10 implementation method and device capable of supporting fast reconstruction

The invention provides a Raid10 implementation method and device capable of supporting fast reconstruction. The method has the technical scheme that 2N pieces of disks are used for constructing Raid10. The method comprises the following steps that: dividing each disk into a first storage area and a second storage area which independently includes m pieces of data blocks, wherein the first N piecesof disks are taken as data disks for storing source data, and the last N pieces of disks are used as mirror image disks for storing mirror image data; establishing a mirror image relationship betweeneach data block in the data disk and each data block in the mirror image disk; and when any disk fails, storing the mirror image data corresponding to the failed disk in a second storage area of other (N-1) pieces of disks which belong to the same type with the mirror image data, and utilizing the mirror image data stored in the second storage area of other (N-1) pieces of disks to execute the reconstruction of the failed