Dynamic magnetic information storage or retrieval – Checking record characteristics or modifying recording...
Patent
1998-06-29
2000-01-25
Kim, W. Chris
Dynamic magnetic information storage or retrieval
Checking record characteristics or modifying recording...
360 53, G11B 502, G11B 509
Patent
active
060184280
ABSTRACT:
The invention provides a method for effectively removing the cause of a thermal asperity (TA) phenomenon occurring at an MR head incorporated in a disk storage system. If a read error occurs in data read by the MR head, a CPU executes a usual read retry operation. If the read error is not removed by the usual read retry operation, the CPU presumes that the read error is caused by the thermal asperity phenomenon occurring at the MR head. Then, the CPU controls the MR head to move to a CSS zone on the disk, thereby executing a TA removal operation so as to remove a fine particle such as dust attached to the MR head. In the TA removal operation, the rotational speed of the disk is reduced so that the MR head can be brought into contact with the disk in the CSS zone.
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Kabushiki Kaisha Toshiba
Kim W. Chris
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