Servo pattern for skew based tape dimensional stability compensation

A tape formatting device, the tape formatting device comprising:

• a controller;
• and
• a servo write head coupled to the controller and configured to write timing-based servo (TBS) patterns on a tape, wherein adjustments to the TBS patterns have been made during manufacturing of the servo write head via operations comprising:
• performing tape dimensional stability (TDS) compensation by:
• performing a rotation of the TBS patterns of a first servo band and a second servo band;
• and
• in response to the rotation of the TBS patterns of the first servo band and the second servo band, adjusting heights of top and bottom portions of servo stripes of servo frames of the TBS patterns to compensate for changes in a usable height of the servo stripes caused by the rotation, wherein an entire TBS pattern is comprised of a first pattern and a second pattern, wherein a height of a top portion of servo stripes of the second pattern is adjusted by a first distance that is a first function of an azimuth angle and an angle of rotation, and wherein a height of a bottom portion of servo stripes of the first pattern is adjusted by a second distance that is a second function of the azimuth angle and the angle of rotation.

A computer program product, the computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured to perform operations in a device, the operations comprising:

• performing tape dimensional stability (TDS) compensation by:
• performing a rotation of timing-based servo (TBS) patterns of a first servo band and a second servo band;
• and
• in response to the rotation of the TBS patterns of the first servo band and the second servo band, adjusting heights of top and bottom portions of servo stripes of servo frames of the TBS patterns to compensate for changes in a usable height of the servo stripes caused by the rotation, wherein an entire TBS pattern is comprised of a first pattern and a second pattern, wherein a height of a top portion of servo stripes of the second pattern is adjusted by a first distance that is a first function of an azimuth angle and an angle of rotation, and wherein a height of a bottom portion of servo stripes of the first pattern is adjusted by a second distance that is a second function of the azimuth angle and the angle of rotation.

A method of manufacturing a tape, the method comprising:

• writing a plurality of servo bands on a magnetic medium by a servo write head, wherein servo patterns have been adjusted during manufacturing of the servo write head via operations comprising:
• performing tape dimensional stability (TDS) compensation by:
• performing a rotation of timing-based servo (TBS) patterns of a first servo band and a second servo band;
• and
• in response to the rotation of the TBS patterns of the first servo band and the second servo band, adjusting heights of top and bottom portions of servo stripes of servo frames of the TBS patterns to compensate for changes in a usable height of the servo stripes caused by the rotation, wherein an entire TBS pattern is comprised of a first pattern and a second pattern, wherein a height of a top portion of servo stripes of the second pattern is adjusted by a first distance that is a first function of an azimuth angle and an angle of rotation, and wherein a height of a bottom portion of servo stripes of the first pattern is adjusted by a second distance that is a second function of the azimuth angle and the angle of rotation.

A method for a servo write head, the method comprising:

• configuring the servo write head to write timing-based servo (TBS) patterns on a tape, wherein adjustments to the TBS patterns have been made during manufacturing of the servo write head via operations comprising:
• performing a rotation of timing-based servo (TBS) patterns of a first servo band and a second servo band;
• and
• in response to the rotation of the TBS patterns of the first servo band and the second servo band, adjusting heights of top and bottom portions of servo stripes of servo frames of the TBS patterns to compensate for changes in a usable height of the servo stripes caused by the rotation, wherein an entire TBS pattern is comprised of a first pattern and a second pattern, wherein a height of a top portion of servo stripes of the second pattern is adjusted by a first distance that is a first function of an azimuth angle and an angle of rotation, and wherein a height of a bottom portion of servo stripes of the first pattern is adjusted by a second distance that is a second function of the azimuth angle and the angle of rotation.