发明授权
US07492540B2 Apparatus system and method for variable data density patterned media
有权
用于可变数据密度图案化介质的装置系统和方法
- 专利标题: Apparatus system and method for variable data density patterned media
- 专利标题(中): 用于可变数据密度图案化介质的装置系统和方法
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申请号: US11532373申请日: 2006-09-15
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公开(公告)号: US07492540B2公开(公告)日: 2009-02-17
- 发明人: Thomas R. Albrecht
- 申请人: Thomas R. Albrecht
- 申请人地址: NL Amsterdam
- 专利权人: Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人: Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理机构: Kunzler & McKenzie
- 主分类号: G11B5/09
- IPC分类号: G11B5/09
摘要:
An apparatus, system, and method are disclosed for variable data density patterned media. The apparatus includes a patterned media recording surface comprising a plurality of sectors. Each sector may include a synchronization region configured to generate a signal in a read head, a first data region with a first data density configured to generate a signal with a first frequency, and at least a second data region with a second data density configured to generate a signal with a second frequency. The system includes a hard disk drive and the apparatus. The method includes sensing a signal in a read head, synchronizing the frequency and phase of a write clock with a predetermined frequency and phase of a synchronization region, and modifying the frequency of the write clock after a period of time determined in response to at least one physical characteristic of the disk.