Method of measuring compensation value for short track seeking in hard disc drive and method of compensating for bias using the same
AssigneeSamsung Electronics Co., Ltd.
InventorCheol-hoon Park
Life of this patent
Estimating the term…
Abstract
A method of calculating bias compensation values for track seeking, including: setting a reference track, and search tracks disposed between the reference track and an innermost track and between the reference track and an outermost track; calculating bias compensation values usable for compensating for biases operating on a magnetic head while moving the magnetic head a direction from the reference track to one of the outermost track and to the innermost track, and then in another direction from the reference track to other of the one of the innermost track and the outermost track; and making bias compensation curves according to head moving distances using the calculated bias compensation values.
Claims23
A method of calculating bias compensation values for track seeking, comprising:
- setting a reference track, and search tracks disposed between the reference track and an innermost track and between the reference track and an outermost track;
- calculating bias compensation values usable for compensating for biases operating on a magnetic head while moving the magnetic head in a direction from the reference track to one of the outermost track and to the innermost track, and then in a direction from the reference track to the other of the one of the innermost track and the outermost track;
- and
- making bias compensation curves according to head moving distances using the calculated bias compensation values.
A method of compensating for a bias generated when performing track seeking of a hard disc drive, using a head moving distance, comprising:
- setting a reference track, and search tracks disposed within a specified range from a track between the reference track and an innermost track to a track between the reference track and an outermost track;
- calculating bias compensation values usable to compensate for biases operating on a magnetic head while moving the magnetic head in the direction from the reference track to one of the outermost track and the innermost track and then in the direction from the reference track to the other of one of the innermost track and the outermost track;
- making bias compensation curves according to head moving distances using the calculated bias compensation values;
- determining whether a head moving distance when performing track seeking by moving the magnetic head is within the specified range;
- and
- compensating for biases using the bias compensation curves when the head moving distance is within the specified range.
A hard disk drive which calculates bias compensation values for track seeking, comprising a controller which:
- sets a reference track, and search tracks disposed between the reference track and an innermost track and between the reference track and an outermost track;
- calculates bias compensation values usable for compensating for biases operating on a magnetic head while moving the magnetic head in a direction from the reference track to one of the outermost track and to the innermost track, and then in a direction from the reference track to the other of the one of the innermost track and the outermost track;
- and
- calculates bias compensation curves according to head moving distances using the calculated bias compensation values.
A hard disk drive which compensates for a bias generated when performing track seeking, comprising a controller which:
- sets a reference track, and search tracks disposed between the reference track and an innermost track and between the reference track and an outermost track;
- calculates bias compensation values usable for compensating for biases operating on a magnetic head while moving the magnetic head in a direction from the reference track to one of the outermost track and to the innermost track, and then in a direction from the reference track to the other of the one of the innermost track and the outermost track;
- calculates bias compensation curves according to head moving distances using the calculated bias compensation values;
- determines whether a head moving distance when performing track seeking by moving the magnetic head is within the specified range;
- and
- compensates for biases using the bias compensation curves when the head moving distance is within the specified range.
Dependencies are inferred from the claim text.