发明授权
- 专利标题: Disk drive apparatus and head switching method
- 专利标题(中): 磁盘驱动装置和磁头切换方法
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申请号: US747296申请日: 1996-11-12
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公开(公告)号: US5943179A公开(公告)日: 1999-08-24
- 发明人: Yukio Fukushima
- 申请人: Yukio Fukushima
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 优先权: JPX7-336722 19951225
- 主分类号: G11B21/08
- IPC分类号: G11B21/08 ; G11B5/55 ; G11B21/10 ; G11B5/596
摘要:
Tilt values between heads in a disk drive apparatus are previously measured. The measured values are stored in a head switch compensation table. In a head switch operation, a track nearest to the present position of a head to be used after a head switch operation is selected as a target track for the head to be used. A head switch compensation table is stored in a disk. The head switch compensation table stores tilt values represented by a number of tracks which corresponds to a relative deviation between heads. For example, if the table contains data showing that a tilt value between head 1 and head 2 is +1 track, then when heads are switched from head 1 to head 2, a target track for head 2 is selected by adding this value +1 to the current track address on which head 1 is positioned. By this method, head 2 can be positioned on the nearest track by a short time seek operation and can continue a sequential read or write operation.
公开/授权文献
- US4658905A Mud valve 公开/授权日:1987-04-21