Recording media, data storage devices, and methods for determining a position error signal in a recording medium
AssigneeMarvell International Ltd.
InventorsJingliang Zhang, Anmin Kong, Songhua Zhang, Zhimin Yuan, Linlin Thi
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Abstract
According to various embodiments, a recording medium may be provided. The recording medium may include a dedicated servo layer configured to provide servo information. The dedicated servo layer may include a plurality of tracks. A first track may include a first servo signal. The first servo signal may include first servo bursts of a pre-determined frequency. A second track adjacent to the first track may include a second servo signal. The second servo signal may include second servo bursts of the pre-determined frequency.
Claims17
A recording medium, comprising:
- a data layer configured to record data therein;
- and
- a dedicated servo layer configured to provide servo information, wherein the dedicated servo layer comprises a plurality of tracks, wherein a first track comprises a first servo signal, the first servo signal including first servo bursts of a predetermined frequency,
- wherein a second track adjacent to the first track comprises a second servo signal, the second servo signal including second servo bursts of the predetermined frequency, and
- wherein the first servo bursts are orthogonal to the second servo bursts, and wherein the data in the data layer and the servo information in the dedicated servo layer are provided in a same direction.
A data storage device, comprising:
- a recording medium comprising
- a data layer configured to record data therein, and
- a dedicated servo layer configured to provide servo information, wherein the dedicated servo layer comprises a plurality of tracks, wherein a first track comprises a first servo signal, the first servo signal including first servo bursts of a predetermined frequency, wherein a second track adjacent to the first track comprises a second servo signal, the second servo signal including second servo bursts of the predetermined frequency, and wherein the first servo bursts are orthogonal to the second servo bursts, and wherein the data in the data layer and the servo information in the dedicated servo layer are provided in a same direction;
- and
- a reader head configured to read a signal from the recording medium.
A method for determining a position error signal in a recording medium, the recording medium comprising:
- a data layer configured to record data therein, a dedicated servo layer configured to provide servo information, wherein the dedicated servo layer comprises a plurality of tracks, wherein a first track comprises a first servo signal, the first servo signal including first servo bursts of a predetermined frequency, and wherein a second track adjacent to the first track comprises a second servo signal, the second servo signal including second servo bursts of the predetermined frequency, the method comprising:
- reading a signal from the first servo bursts and/or the second servo bursts of the recording medium;
- and
- determining a position error signal based on the read signal,
- wherein the first servo bursts are orthogonal to the second servo bursts, and wherein the data in the data layer and the servo information in the dedicated servo layer are provided in a same direction.
Dependencies are inferred from the claim text.