发明名称 |
Bi staple flying height detection by BEMF control profile and data integrity problem protection |
摘要 |
Embodiments of the present invention relate to detecting a flying high state in which a head/slider is flying stably at a high flying position, and then to restore the head/slider to a normal flying position. The detection is made by detecting a read output of a head using a head output detector, and by detecting a gain of a VGA using a gain detector. A control unit uses a value measured in a normal flying state as a reference value to compare a detected value with the reference value. If the compared values differ from each other, the control unit judges that a flying high state has occurred. The control unit, therefore, moves the head/slider to the vicinity of the innermost circumferential track of the disk, or unloads the head/slider.
|
申请公布号 |
US2005094299(A1) |
申请公布日期 |
2005.05.05 |
申请号 |
US20040944356 |
申请日期 |
2004.09.17 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS, B.V. |
发明人 |
TOKIZONO AKIRA;SASAKI CHIKAKO;OKADA KENJI |
分类号 |
G11B21/21;G11B5/09;G11B5/596;G11B5/60;G11B20/18;G11B21/02;G11B21/10;G11B21/12;G11B27/36;(IPC1-7):G11B27/36 |
主分类号 |
G11B21/21 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|