发明授权
- 专利标题: Disk drive writing wedge RRO values in a butterfly pattern
- 专利标题(中): 磁盘驱动器写入楔形RRO值为蝴蝶图案
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申请号: US11924830申请日: 2007-10-26
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公开(公告)号: US07576941B1公开(公告)日: 2009-08-18
- 发明人: Teddy T. C. Chen , Eugene Chun-Tsing Wu , John Yin Kwong Li , Jie Yu , Jonathan V. Nguyen , Tuong M. Vu , Guoxiao Guo
- 申请人: Teddy T. C. Chen , Eugene Chun-Tsing Wu , John Yin Kwong Li , Jie Yu , Jonathan V. Nguyen , Tuong M. Vu , Guoxiao Guo
- 申请人地址: US CA Lake Forest
- 专利权人: Western Digital Technologies, Inc.
- 当前专利权人: Western Digital Technologies, Inc.
- 当前专利权人地址: US CA Lake Forest
- 代理商 Howard H. Sheerin, Esq.
- 主分类号: G11B5/596
- IPC分类号: G11B5/596
摘要:
A disk drive is disclosed comprising a plurality of servo sectors that define a plurality of tracks, and a head comprising a read element radially offset from a write element. The read element is positioned over a first track, and the first track is read to generate first read wedge repeatable runout (WRRO) values. A first seek operation of the head positions the read element over a second track, and the second track is read to generate first write WRRO values. The first write WRRO values are used to write the first read WRRO values to the first track. A second seek operation of the head positions the read element over a third track, and the third track is read to generate second write WRRO values. The second write WRRO values are used to write the first write WRRO values to the second track.
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