| 发明名称 | Magnetic disk device and determining method of crossing a zone boundary | ||
| 摘要 | According to one embodiment, a magnetic disk device includes a magnetic disk in which servo patterns with different writing frequencies are recorded and divided into a plurality of zones in a cross-track direction; a magnetic head that is provided for the magnetic disk; and a controller to determine whether the magnetic head cross a zone boundary between the zones of the servo patterns, according to a predicted position of the magnetic head that is corrected with reference to a phase shift time between the zones of the servo patterns. | ||
| 申请公布号 | US9384768(B1) | 申请公布日期 | 2016.07.05 |
| 申请号 | US201514639008 | 申请日期 | 2015.03.04 |
| 申请人 | Kabushiki Kaisha Toshiba | 发明人 | Asakura Makoto |
| 分类号 | G11B5/596;G11B5/55;G11B20/10 | 主分类号 | G11B5/596 |
| 代理机构 | White & Case LLP | 代理人 | White & Case LLP |
| 主权项 | 1. A magnetic disk device, comprising: a magnetic disk in which servo patterns with different writing frequencies are recorded and divided into a plurality of zones in a cross-track direction; a magnetic head that is provided for the magnetic disk; and a controller to determine whether the magnetic head cross a zone boundary between the zones of the servo patterns, according to a predicted position of the magnetic head that is corrected with reference to a phase shift time between the zones of the servo patterns, wherein the controller corrects the predicted position in such a manner that the servo patterns are detected immediately after the magnetic head crosses the zone boundary. | ||
| 地址 | Tokyo JP | ||