Method and apparatus for determining a location of a defect on a storage medium
First Claim
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1. A method, comprising:
- detecting a change in a property of a signal, the signal being sensed from a storage medium by a disk drive;
determining a count corresponding to a first location on the storage medium at which the change in the property of the signal sensed from the storage medium is detected; and
using the count to predict a second location on the storage medium at which the change in the property of the signal sensed from the storage medium is detected,wherein, relative to the first location on the storage medium, the second location on the storage medium is closer to an actual location of a feature on the storage medium that causes the change in the property of the signal sensed from the storage medium.
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Abstract
A defect is detected on a storage medium of a disk drive. A location of the defect is determined, within a smallest addressable unit of data stored on the storage medium. An indication of the location is stored in a memory. A location of a sensor of the disk drive relative to the data stored on the storage medium is monitored. A response of at least one of a defect detector of the disk drive, a read channel controller of the disk drive, and a servo controller of the disk drive is changed based on the location of the sensor relative to the data stored on the storage medium and the stored indication of the location of the defect.
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Citations
25 Claims
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1. A method, comprising:
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detecting a change in a property of a signal, the signal being sensed from a storage medium by a disk drive; determining a count corresponding to a first location on the storage medium at which the change in the property of the signal sensed from the storage medium is detected; and using the count to predict a second location on the storage medium at which the change in the property of the signal sensed from the storage medium is detected, wherein, relative to the first location on the storage medium, the second location on the storage medium is closer to an actual location of a feature on the storage medium that causes the change in the property of the signal sensed from the storage medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A disk drive, comprising:
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one or more devices configured to; detect a change in a property of a signal sensed from a storage medium by the disk drive; determine a count corresponding to a location within a unit of data on the storage medium at which the change in the property of the signal sensed from the storage medium is detected; and use the count to predict a location of a feature of the storage medium that causes the change in the property of the signal sensed from the storage medium. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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detecting a change in a property of a signal sensed from a storage medium by a disk drive; determining a count corresponding to a location at which the change in the property of the sensed signal is detected relative to a particular angular position on the storage medium; predicting a location of a feature of the storage medium that causes the change in the property of the sensed signal based on the count. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A disk drive, comprising:
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one or more devices configured to; detect a change in a property of a signal sensed from a storage medium by the disk drive; determine a count corresponding to a location at which the change in the property of the sensed signal is detected relative to a particular angular position on the storage medium; predict a location of a feature of the storage medium that causes the change in the property of the sensed signal based on the count. - View Dependent Claims (24, 25)
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Specification