Patent ID: 7092199

Claim:
A magnetic tape comprising a non-magnetic support, at least one magnetic layer formed on one surface of the non-magnetic support, and a backcoat layer formed on the other surface of the non-magnetic support, wherein servo signals for controlling tracking are recorded on the magnetic layer or the backcoat layer, said magnetic tape having recording tracks with a width of 21 μm or less and being run at a speed of 4 m/sec. or higher, wherein the value of (α/W)×(V/f) is 10 [s −1 ] or less, in which V [mm/sec.] is a tape-running speed; α [μm] is an amount of a weave with a cycle of f [mm] on one edge of the tape or the other edge thereof, as the reference side, for the running of the tape; and W [μm] is a width of the recording track.