Certain data storage devices operate by moving a sequential information storage medium across a read head having multiple read/write elements. To efficiently read and write data to and from the tape, it is necessary that the tape be in physical contact with the read head. To maintain contact between the sequential information storage medium and the read head, the sequential information storage medium is directed towards the read head at an angle, called the wrap angle, such that an air pressure differential is created which presses the tape against the read/write head.
Such a wrap angle is set by adjusting upwardly or downwardly the position of a roller disposed adjacent the read head. The roller position must be set during data storage device manufacture or maintenance. Prior art apparatus and methods require a time-consuming process to determine a nominal wrap angle, and then position the roller using that nominal wrap angle.