Recording medium
View Patent ↗In various embodiments, a recording medium having a servo layer configured to provide servo information and a data recording layer configured to record data, wherein the medium comprises a plurality of servo patterns and a plurality of data segment in one sector, each data segment corresponding to each of the plurality of servo patterns, wherein the plurality of servo patterns comprises a first servo pattern comprising an automatic gain control, a second servo pattern comprising a sector address mark, a third servo pattern comprising a GrayCode, and a fourth servo pattern comprising a plurality of servo bursts, wherein the data recording layer is configured to record the data on the data segments corresponding to the first, second, third and fourth servo patterns.
1. A recording medium comprising:
a servo layer; and
a data recording layer;
wherein the medium comprises a plurality of servo patterns;
wherein the plurality of servo patterns comprises:
a first servo pattern comprising an automatic gain control;
a second servo pattern comprising a sector address mark;
a third servo pattern comprising a GrayCode; and
a fourth servo pattern comprising a plurality of servo bursts;
wherein the first servo pattern, the second servo pattern and the third servo patterns are stored in the data recording layer;
wherein the fourth servo pattern is stored in the servo layer;
wherein the plurality of servo bursts forms a A/B frequency burst type: and
wherein the A and B bursts are located at different off-track positions but at the same down-track positions.
2. The recording medium according to claim 1 wherein the medium is a magnetic medium.
3. The recording medium according to claim 1 wherein the servo layer has a higher coercivity value compared to the data recording layer.
4. A data storage device comprising:
a recording medium comprising:
a servo layer; and
a data recording layer;
wherein the medium comprises a plurality of servo patterns; and
a servo control system configured to access the recording medium;
wherein the plurality of servo patterns comprises:
a first servo pattern comprising an automatic gain control;
a second servo pattern comprising a sector address mark;
a third servo pattern comprising a GrayCode; and
a fourth servo pattern comprising a plurality of servo bursts;
wherein the first servo pattern, the second servo pattern and the third servo patterns are stored in the data recording layer;
wherein the fourth servo pattern is stored in the servo layer;
wherein the plurality of servo bursts forms a A/B frequency burst type; and
wherein the A and B bursts are located at different off-track positions but at the same down-track positions.