A servo pattern recording method according to an embodiment of the present technology is a servo pattern recording method of recording a servo pattern on a tape-like magnetic recording medium including a magnetic layer including five or more servo bands, the method including: determining at least three first servo bands in which first servo band identification information constituted by a plurality of bits is to be recorded, and at least two second servo bands in which second servo band identification information constituted by a plurality of bits is to be recorded, the second servo band identification being different from the first servo band identification information; and recording each of the first servo band identification information and the second servo band identification information in the first servo band and the second servo band on the same phase.

A servo pattern recording method according to an embodiment of the present technology is a servo pattern recording method of recording a servo pattern on a tape-like magnetic recording medium including a magnetic layer including five or more servo bands, the method including: determining at least three first servo bands in which first servo band identification information constituted by a plurality of bits is to be recorded, and at least two second servo bands in which second servo band identification information constituted by a plurality of bits is to be recorded, the second servo band identification being different from the first servo band identification information; and recording each of the first servo band identification information and the second servo band identification information in the first servo band and the second servo band on the same phase.

The magnetic tape device includes: a magnetic tape; and a reproducing head, in which the reproducing head is a TMR head, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, a full width at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before performing a vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 7.0 nm, a full width at half maximum of spacing distribution measured after performing the vacuum heating is greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 9.0 nm.

The magnetic tape device includes: a magnetic tape; and a reproducing head, in which the reproducing head is a TMR head, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, a full width at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before performing a vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 7.0 nm, a full width at half maximum of spacing distribution measured after performing the vacuum heating is greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 9.0 nm.

The magnetic tape device includes: a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, the magnetic layer includes a servo pattern, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 9.0 nm.

The magnetic tape device includes: a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, the magnetic layer includes a servo pattern, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 9.0 nm.

A data storage device or disk drive may include a plurality of regulators, a first voltage rail associated with a first regulator of the plurality of regulators, a second voltage rail associated with a second regulator of the plurality of regulators, wherein a switching frequency of the second regulator is greater than a switching frequency of the first regulator, the first voltage rail is associated with a higher voltage than the second voltage rail, or a combination thereof. The data storage device may include one or more processing devices configured to: determine a minimum switching frequency, identify a start time of a switching cycle for the first regulator, based at least in part on determining the minimum switching frequency; and, at or near the start time of the new switching cycle, couple the first regulator to the second regulator to initiate the switching cycle.