Tension transients suppression during acceleration and/or deceleration for storage tape drive

A method, comprising:

• determining a reference velocity at various intervals;
• receiving or determining a secondary velocity based at least in part on a parameter associated with a motor of the drive mechanism;
• determining a value representative of a difference between the reference velocity and the secondary velocity;
• adjusting a speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and the secondary velocity;
• receiving or determine a primary velocity based on reading a servo track of the magnetic tape;
• at a switching point, making the reference velocity about equal to the primary velocity;
• after the switching point, determining the reference velocity at various intervals;
• after the switching point, determining a value representative of a difference between the reference velocity and the primary velocity;
• and
• adjusting the speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and the primary velocity.

A data storage system, comprising:

• a magnetic head;
• a drive mechanism for passing a magnetic tape over the magnetic head;
• and
• a controller electrically coupled to the drive mechanism, the controller being configured to:
• determine a reference velocity at various intervals;
• receive or determine a primary velocity based on reading a servo track of the magnetic tape;
• determine a value representative of a difference between the reference velocity and the primary velocity;
• adjust a speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and the primary velocity;
• receive or determine a secondary velocity based at least in part on a parameter associated with a motor of the drive mechanism;
• at a switching point, make the reference velocity about equal to the secondary velocity;
• after the switching point, determine the reference velocity at various intervals;
• after the switching point, determine a value representative of a difference between the reference velocity and the secondary velocity;
• and
• adjust the speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and the secondary velocity.

A method, comprising:

• determining a reference velocity at various intervals;
• receiving or determining a primary velocity based on reading a servo track of the magnetic tape;
• determining a value representative of a difference between the reference velocity and the primary velocity;
• adjusting a speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and the primary velocity;
• receiving or determining a secondary velocity based at least in part on a parameter associated with a motor of the drive mechanism;
• at a switching point, making the reference velocity about equal to the secondary velocity;
• after the switching point, determining the reference velocity at various intervals;
• after the switching point, determining a value representative of a difference between the reference velocity and the secondary velocity;
• and
• adjusting the speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and the secondary velocity.