Wide write head with thermal asperity detector and method of using the same
First Claim
Patent Images
1. A method of detecting a disc defect comprising the steps of:
- writing a first data track to the disc with a write head including a write element and a thermal asperity detector;
detecting magnetic defects on the first data track with a certification head; and
scanning the first data track for thermal asperities with the thermal asperity detector.
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Abstract
A system for detecting thermal asperities and magnetic defects on a disc. The system includes a wide write head and a certification head. The wide write head includes a thermal asperity detector and a write element. A method for detecting thermal asperities and magnetic defects comprising writing a track with the wide write head, reading defects with the certification head, and scanning for thermal asperities with the thermal asperity detector. A burst pattern can be written to the disc upon locating a asperity of defect.
18 Citations
21 Claims
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1. A method of detecting a disc defect comprising the steps of:
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writing a first data track to the disc with a write head including a write element and a thermal asperity detector;
detecting magnetic defects on the first data track with a certification head; and
scanning the first data track for thermal asperities with the thermal asperity detector. - View Dependent Claims (2, 3)
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4. A method of detecting magnetic and thermal asperities on a disc comprising the steps of:
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writing a first data stream to a first wide track on the disc with a write head located on a write head;
reading the first data stream on a first portion of the first wide track for magnetic defects with a read element located on a certifier head; and
scanning the first wide track for thermal asperities with a thermal asperity detector located on the write head. - View Dependent Claims (5, 6, 7)
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8. A testing system comprising:
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a disc drive having a spindle on which a disc can be mounted and motor for rotating the disc; and
means for detecting thermal asperities and magnetic defects. - View Dependent Claims (9, 10, 11, 12, 15, 16, 17, 18, 19, 20, 21)
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13. A testing system for detecting thermal asperities and magnetic defects on a disc comprising:
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a write head including a write element, the write head located on a first support arm wherein the write element is activated to write a track onto the disc during a first period;
a thermal asperity detector, wherein the asperity detector is activated to detect asperities during a second period; and
a read head located on a second support arm wherein the read head is positioned to read the track written by the write element.
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14. A testing system for detecting thermal asperities and magnetic defects on a disc comprising:
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a write head including a write element and a thermal asperity detector, the write head located on a first support arm wherein the write element is activated to write a track onto the disc during a first period and the asperity detector is activated to detect asperities during a second period; and
a read head located on a second support arm wherein the read head is positioned to read the track written by the write element.
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Specification