To arrange data in a noncontiguous way to increase performance. When used to describe disc drives, it refers to the way sectors on a disc are organized. In one-to-one interleaving, the sectors are placed sequentially around each track. In two-to-one interleaving, sectors are staggered so that consecutively numbered sectors are separated by an intervening sector. The purpose of interleaving is to make the disc drive more efficient. The disc drive can access only one sector at a time, and the disc is constantly spinning beneath..”