发明名称 |
Optimal reader-to-writer offset measurement of a head in a disc drive for reduced track misregistration |
摘要 |
A method of and apparatus for generating a reader-to-writer offset for a head positioned over a track on a disc in a disc drive having a plurality of tracks is disclosed. A reader and a writer are mounted on the head in a non-overlapping manner with a gap between the reader and the writer, which is known as the reader-to-writer offset. A disc drive controller is operably connected to the reader and the writer. The disc drive controller determines the reader-to-writer offset of the head for each track by computing the difference between a first head position x1 and a second head position x2. The first head position x1 is an optimal head position for writing information on the track and the second head position x2 is a midpoint of an off-track capability (OTC) of the head. The OTC is a portion of a track pitch over which the reader is expected to read information that is free of an incorrigible bit error such that the writer-to-reader track misregistration (TMR) is minimized as the head is radially displaced the reader-to-writer offset to read information written on the track or to write information on the track.
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申请公布号 |
US6754030(B2) |
申请公布日期 |
2004.06.22 |
申请号 |
US20010029318 |
申请日期 |
2001.12.21 |
申请人 |
SEAGATE TECHNOLOGY LLC |
发明人 |
SENG EDMUN CHIAN SONG;LIU XIONG;LIM AIK CHUAN;TANG KAY HEE;KAN UTT HENG;LIM CHOON KIAT |
分类号 |
G11B5/596;G11B20/20;G11B27/36;(IPC1-7):G11B5/00 |
主分类号 |
G11B5/596 |
代理机构 |
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地址 |
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