发明名称 |
Methods and apparatus for detection and analysis of an envelope of a frequency modulated readback signal in a magnetic storage system |
摘要 |
Embodiments of systems, methods and article of manufacture provide for readback signal detection and analysis. One embodiment provides an in-situ system to detect envelope traces of a readback signal. Using the envelope data, the presence of undesirable activity and/or storage medium surface conditions may be determined. For example, head modulation may be determined. Upon detection of a modulation event in a sector or a track, the compromised data may be recovered using a signal processing system. Another embodiment provides for detection of a thermal signal component in a readback signal. The thermal signal is processed for surface information indicative of the surface condition. Information indicating a defect may then be used to avoid storage areas having the defects.
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申请公布号 |
US6665134(B2) |
申请公布日期 |
2003.12.16 |
申请号 |
US20010872720 |
申请日期 |
2001.06.01 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
OTTESEN HAL HJALMAR;SMITH GORDON JAMES |
分类号 |
G11B5/00;G11B5/012;G11B20/10;G11B27/36;G11B33/14;(IPC1-7):G11B27/36 |
主分类号 |
G11B5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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