| 发明名称 |
Disk drive adjusting a defect threshold when scanning for defective sectors |
| 摘要 |
A disk drive is disclosed including a disk having a plurality of sectors, and a head actuated over the disk. A defect threshold is initialized, and a first sector is read to generate a first read signal. The first read signal is processed to detect a defect in the first sector relative to the defect threshold. After detecting the defect, the defect threshold is adjusted and the first sector is reread to generate a second read signal. The second read signal is processed to detect the defect in the first sector relative to the adjusted defect threshold. |
| 申请公布号 |
US9042045(B1) |
申请公布日期 |
2015.05.26 |
| 申请号 |
US200711933662 |
申请日期 |
2007.11.01 |
| 申请人 |
Western Digital Technologies, Inc. |
发明人 |
Dang Dean V.;Chua Kek Ming;Goh King S.;Balasubramaniam Prakash;Jin Ming |
| 分类号 |
G11B27/36;G11B5/09;G11B5/596;G11B20/18;G11B20/12 |
主分类号 |
G11B27/36 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A disk drive comprising:
a disk comprising a plurality of sectors; a head actuated radially over the disk; and control circuitry operable to:
initialize a defect threshold;read a first sector to generate a first read signal;process the first read signal to detect a defect in the first sector relative to the defect threshold;after the defect is detected, adjust the defect threshold;reread the first sector to generate a second read signal; and process the second read signal to verify the defect in the first sector relative to the adjusted defect threshold. |
| 地址 |
Irvine CA US |
