Patterned magnetic media with offset data and servo regions
A patterned magnetic media having offset servo and data regions. The media can be constructed by a method that allows both a data region and a servo region to be patterned without the patterning of one region adversely affecting the patterning of the other region. The method results in a patterned data region a patterned servo region and intermediate regions between the servo and data regions. The intermediate regions, which are most likely, but not necessarily, asymmetrical with one another indicate that the method has been used to pattern the media.
1. A patterned magnetic media, comprising:
first and second patterned data regions;
a patterned servo region having first and second sides;
a first intermediate region between the servo region and the first data region at the first side of the servo region; and
a second intermediate region between servo region and the second data region at the second side of the servo region;
wherein the first and second intermediate regions are asymmetrical with one another, one being wider than the other.
2. The magnetic media as in claim 1 wherein the first and second intermediate regions are data free regions that contain no data, the data free regions being located up-track and down-track from the servo region.
3. The magnetic media as in claim 1 wherein each of the first and second intermediate regions has a pattern that provides no useful servo information or data information.
4. The magnetic media as in claim 1 wherein the servo region includes a timing pattern and a servo pattern.
5. The magnetic media as in claim 1 wherein the data region includes a pattern of concentric tracks of individual bits.
6. The magnetic media as in claim 1 wherein the data region includes a pattern of concentric continuous tracks.
7. The magnetic media as in claim 2 wherein the data free regions are unequal in length as measured along a direction of a data track.
8. The magnetic media as in claim 1 further comprising alignment targets that record an overlay of masks used to create the patterned data region.
9. The magnetic media as in claim 1 further comprising alignment targets that record an overlay of masks used to create the patterned servo region.
10. A magnetic data recording system,
a housing;
a magnetic media mounted within the housing;
an actuator; and
a slider having a magnetic sensor and a magnetic write head formed thereon, the slider being connected with the actuator for movement adjacent to a surface of the magnetic medium;
the magnetic media further comprising:
first and second patterned data regions;
a patterned servo region having first and second sides;
a first intermediate region between the servo region and the first data region at the first side of the servo region; and
a second intermediate region between servo region and the second data region at the second side of the servo region;
wherein the first and second intermediate regions are asymmetrical with one another, one being wider than the other.