Data read from hard drive is know as tracks. Track is a physical division of data in disk drive as use in CHR (Cylinder head record) which address mode of CKD disk. Tracks are divided into two block they are sector and pages. The concept is concentric through the physical platters, being data circle on each cylinder of whole disk drive . The number of tracks on single surface in the drive exactly equals the number of cylinders of the drive.The disk drive is circular path on the surface of a disk on which information is magnetically recorded.