Detection of track misregistration within user data channel
AssigneeAgency for Science, Technology and Research
InventorsWai Ee Wong, Guoxiao Guo, Abdullah Al Mamun, Weichun Ye, Jingliang Zhang
Life of this patent
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Abstract
A method for computing position error signal information of a transducer in a data storage system provides for different readback signals between adjacent tracks. The method involves a computation to obtain coarse position information from the servo bursts signals for track seeking and a computation to obtain a position indicator from the user data sector for more precise track following within the user data sector.
Claims30
A method for estimating a position of a transducer relative to a disk in a disk drive, the method comprising:
- receiving a data information signal and writing the data information signal in a data sector on the disk;
- estimating position information of the transducer relative to a servo sector on the disk using encoded servo information;
- and
- determining position information of the transducer relative to the data sector on the disk using the data information signal written in the data sector on the disk and the position information of the transducer relative to the servo sector;
- wherein the data information signal is subject to a change through alteration in time interval setting.
An apparatus for estimating a position of a transducer relative to a disk in a disk drive comprising:
- a first circuit for receiving a data information signal and writing the data information signal in a data sector on the disk;
- a second circuit for estimating position information of the transducer relative to a servo sector on the disk using encoded servo information;
- and
- a third circuit for determining position information of the transducer relative to the data sector on the disk using the data information signal written in the data sector on the disk and the position information of the transducer relative to the servo sector;
- wherein the data information signal is subject to a change through alteration in time interval setting.
Dependencies are inferred from the claim text.