Device and method for compensating for interhead track position offset due to the offset of tracks on disk surfaces

A method for compensating for interhead track position offset in a disk drive recording device, comprising the steps of:

• providing at least one disk including concentrically arranged tracks with servo information periodically arranged on the tracks;
• providing a plurality of heads separated from each other and positioned in opposing relation to respective surfaces of the at least one disk;
• measuring interhead track position offset values representative of the interhead track position offset in an embedded servo sector mode caused by offset of tracks on disk surfaces resulting from a servo recording pattern on the respective surfaces of the at least one disk, the step of measuring interhead track position offset values comprising generating a corresponding identification signal whenever a servo address mark is detected and combining the corresponding identification signal and a servo calibration signal to measure a corresponding value of the interhead track position offset, and then determining an average value of the interhead track position offset values;
• and
• compensating for the interhead track position offset caused by offset of tracks on disk surfaces resulting from said servo recording pattern by using the average value in head switching.

A method for compensating for interhead track position offset in a disk drive recording device, comprising the steps of:

• searching a predetermined cylinder of at least one disk on which servo information is recorded to locate a servo calibration track;
• setting one of a plurality of heads as a reference head and measuring track position offset values while switching from the reference head to a second one of the heads, the measuring track position offset values comprising generating a corresponding identification signal whenever a servo address mark is detected and combining the corresponding identification signal and a servo calibration signal to measure a corresponding value of the track position offset;
• determining and storing an average value of the track position offset values;
• and
• compensating for the interhead track position offset in an embedded servo sector mode caused by offset of tracks on disk surfaces resulting from a servo recording pattern by using the average value, and then performing head switching between the reference head and the second one of the heads.

A method for compensating for track position offset on a disk recording medium in a disk drive recording apparatus, comprising the steps of:

• designating a first head as a reference head and measuring track position offset values from the disk recording medium while switching from the reference head to a second head, the reference head being positioned in opposing relation to a first surface of the disk recording medium and the second head being positioned in opposing relation to a second surface of the disk recording medium opposite the first surface of the disk recording medium, the measuring track position offset values comprising generating a corresponding identification signal whenever a servo address mark is detected and combining the corresponding identification signal and a servo calibration signal to measure a corresponding value of the track position offset;
• determining and storing an average value of the track position offset values;
• and
• compensating for the track position offset in an embedded servo sector mode caused by offset of tracks on disk recording medium surfaces resulting from a servo recording pattern by using the average value, and then performing bead switching between the reference head and the second head.