| 发明名称 |
Disk drive performing spiral scan of disk surface to detect residual data |
| 摘要 |
A disk drive is disclosed comprising a disk surface comprising a radius, a head operable to generate a read signal, and a voice coil motor (VCM) operable to actuate the head over the disk surface. A back electromotive force (BEMF) voltage generated by the VCM is measured. The VCM is controlled to move the head over substantially the entire radius of the disk surface in response to the BEMF voltage, and while moving the head the read signal from the head is processed to detect residual data recorded on the disk surface after erasing the disk surface. |
| 申请公布号 |
US8896957(B1) |
申请公布日期 |
2014.11.25 |
| 申请号 |
US201313922935 |
申请日期 |
2013.06.20 |
| 申请人 |
Western Digital Technologies, Inc. |
发明人 |
Ng Yap Han;Park Charles A.;Jomthaisong Songwut;Weerasooriya Siri S.;Rigney Brian P. |
| 分类号 |
G11B5/03;G11B21/02;G11B27/36;G11B5/024 |
主分类号 |
G11B5/03 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A disk drive comprising:
a disk surface comprising a radius; a head operable to generate a read signal; a voice coil motor (VCM) operable to actuate the head over the disk surface; and control circuitry operable to:
measure a back electromotive force (BEMF) voltage generated by the VCM;control the VCM to move the head over substantially the entire radius of the disk surface in response to the BEMF voltage; andwhile moving the head, process the read signal from the head to detect residual data recorded on the disk surface after erasing the disk surface. |
| 地址 |
Irvine CA US |
