发明名称 |
Written-in repeatable run-out compensation in embedded servo disc drives |
摘要 |
An apparatus and method of correcting for written-in repeatable run-out in a disc drive having a servo loop for positioning a head over a rotating disc is provided. The rotating disc has at least one data track and servo information recorded in a plurality of servo fields along the data track. An initial written-in repeatable run-out compensation value for each servo field is computed as a function of a position error signal generated for each servo field during a first revolution of the disc. The initial written-in repeatable run-out compensation value for each servo field is then injected into the servo loop during another revolution of the disc. A compensated position error signal for each servo field is computed as a function of the initial written-in repeatable run-out compensation value for each servo field. A refined written-in repeatable run-out compensation value for each servo field is then computed as a function of the compensated position error signal for each servo field.
|
申请公布号 |
US6804079(B2) |
申请公布日期 |
2004.10.12 |
申请号 |
US20010017930 |
申请日期 |
2001.12.12 |
申请人 |
SEAGATE TECHNOLOGY LLC |
发明人 |
HSIN YI-PING |
分类号 |
G11B5/596;(IPC1-7):G11B5/596 |
主分类号 |
G11B5/596 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|