Method of controlling a recording current, and magnetic disk...

Details Method of controlling a recording current, and magnetic disk... Method of controlling a recording current, and magnetic disk...

2005-09-16

2008-11-25

Feild, Joseph (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

C360S067000, C360S075000

Reexamination Certificate

active

07457067

ABSTRACT:
Embodiments of the invention make it possible to conduct stable recording on a magnetic disk, even in case of changes in flying height due to thermal protrusion. In one embodiment, a compensatory recording current value A2is used when a first section of user data is recorded in the required number of data sectors from the data sector of the starting address for recording the user data to the data sector of an intermediate address. A recording current value A3smaller than the compensatory recording current value is used when a second section of user data is recorded in the data sectors existing from the data sector of the intermediate address towards the ending address.

REFERENCES:
patent: 5909336 (1999-06-01), Schaffner et al.
patent: 6914738 (2005-07-01), Fujiwara et al.
patent: 6972920 (2005-12-01), Kim et al.
patent: 7023641 (2006-04-01), Doi et al.
patent: 7027251 (2006-04-01), Darragh et al.
patent: 2004-079126 (2004-03-01), None
patent: 2004-110918 (2004-04-01), None

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