The track density of magnetic tracks is measured in tracks per inch
(tpi). tpi is the characteristic value for the storage capacity of various storage media and stands for storage density and recording density. In the case of magnetic tapes, floppy disks and hard disks, there is also the track density. This is the number of adjacent magnetic tracks. This characteristic value is given in tracks per inch (tpi). This value depends on the one hand on the magnetic tape and on the other hand on the magnetic head.