发明名称 |
Disk drive detecting defective spiral servo track |
摘要 |
A disk drive is disclosed comprising a disk and a head actuated over the disk, wherein the disk comprises a plurality of spiral tracks, each comprising a high frequency signal interrupted by a sync mark at a sync mark interval. The head is used to read a spiral track to generate a spiral track crossing signal g(xn), where xn is a time in a demodulation window. A position error signal (PES) is determined in response to g(xn), and a deviation index is computed by correlating g(xn) with a nominal track crossing signal shifted by the PES. When the deviation index is less than a threshold, the PES is used to servo the head over the disk.
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申请公布号 |
US7746592(B1) |
申请公布日期 |
2010.06.29 |
申请号 |
US20090371434 |
申请日期 |
2009.02.13 |
申请人 |
WESTERN DIGITAL TECHNOLOGIES, INC. |
发明人 |
LIANG JIANGANG;WEERASOORIYA SIRI S. |
分类号 |
G11B21/02;G11B5/09;G11B5/596 |
主分类号 |
G11B21/02 |
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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