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US 8,576,507 B2Granted
Disc drive data recovery utilizing off center track information
AssigneeSeagate Technology LLC
InventorBernardo Rub
Life of this patent
Estimating the term…
Abstract
Disc drive data recovery methods and systems that utilize off center track information are provided. A disc drive data track is illustratively read at a first position along a width of the data track and at a second position along the width of the data track. The data read from the track is stored and tagged with indications of the first and the second positions. The tagged data is optionally used to calculate average waveforms for each of the first and the second positions and to identify the average waveform having the highest signal-to-noise ratio.
Claims20
A method comprising:
- reading a data track at a first position along a width of the data track;
- reading the data track at a second position along the width of the data track, the first and the second positions being predetermined positions corresponding to different physical locations along the width of the data track, and the first and the second positions being at a substantially same location along a length of the data track;
- storing data read from the data track;
- and
- tagging the stored data with indications of the first and the second positions.
2 more elements
A method comprising:
- reading a data track at multiple locations along a width of the data track, the multiple locations along the width of the data track being substantially co-located along a length of the data track;
- and
- calculating an average waveform for each of the multiple locations.
A data storage system comprising:
- a recording medium having data tracks, each of the data tracks having a width that runs between an inner diameter of the recording medium and an outer diameter of the recording medium;
- and
- a processing unit configured to store different waveforms for each of the data tracks into a memory unit, the processing unit configured to store, for each of the different waveforms for at least one of the data tracks, information indicative of a different associated position along the width of the data track, the different associated positions along the width of the data track being in about a same relative instantaneous position along a length of the data track.
Dependencies are inferred from the claim text.