Magnetic tape apparatus having characterized head tilt angle

A magnetic tape apparatus comprising:

• a magnetic tape;
• and
• a magnetic head,
• wherein the magnetic head includes a module including an element array that includes a plurality of magnetic head elements between a pair of servo signal reading elements,
• the magnetic tape apparatus changes an angle θ formed by an axis of the element array with respect to a width direction of the magnetic tape, during running of the magnetic tape in the magnetic tape apparatus, and
• the magnetic tape includes a non-magnetic support and a magnetic layer containing ferromagnetic powder,
• the non-magnetic support is a polyethylene naphthalate support having a Young's modulus in a width direction of 10000 MPa or more,
• the magnetic layer includes a plurality of servo bands,
• the following Expression 1 is satisfied:
• TDSage+TDSenv−TC≤0.10 μm, (Expression 1)
• in Expression 1,
• TDSage is a maximum value of an absolute value of a difference between a servo band interval obtained before storage and a servo band interval obtained after the storage, in an environment of a temperature of 60° C. and of a relative humidity of 20% for 36 hours, and a unit is μm,
• TDSenv is a value calculated by multiplying a difference between a maximum value and a minimum value in servo band intervals obtained respectively in the following five environments by ½, and a unit is μm:
• a temperature of 16° C. and a relative humidity of 20%,
• a temperature of 16° C. and a relative humidity of 80%,
• a temperature of 26° C. and a relative humidity of 80%,
• a temperature of 32° C. and a relative humidity of 20%, and
• a temperature of 32° C. and a relative humidity of 55%,
• the TC is a value calculated by TC=L{cos(θinitial−Δθ)−cos(θinitial+Δθ)}, and a unit is μm,
• the L is a distance between the pair of servo signal reading elements, and a unit is μm,
• the angle θ at start of the running of the magnetic tape is set as θinitial,
• a maximum value of the angle θ during the running of the magnetic tape is set as θmax and a minimum value of the angle θ during the running of the magnetic tape is set as θmin, and
• the Δθ is a larger value among values calculated by Δθmax=θmax−θinitial, and
• Δθmin=θinitial−θmin.