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High current continuous dummy write (ERP), high current write pre-scan (MFG test)

IP.com Disclosure Number: IPCOM000013803D
Original Publication Date: 2000-Jul-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue



In data error recovery procedure (ERP), high-current continuous dummy write operation for several rotation, is performed at dedicated track to remove dust /stains from head poletip (read write element), that disturbs correct data recovery. High current helps poletip scrubbing by maximized head disk interference. In unit test process (MFG), similar high current write operation is performed for whole surface at normal or at high temperature, to clean up dust /asperity on head and disk, to reduce data error by head disk interference. 1