Method and apparatus for head positioning control in...

Details Method and apparatus for head positioning control in... Method and apparatus for head positioning control in...

2006-03-28

2006-03-28

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077020, C360S078040

Reexamination Certificate

active

07019936

ABSTRACT:
A perpendicular magnetic recording disk drive is discloses which performs a head positioning control operation effectively against a hard easy transition shift (HETS) phenomenon. In the disk drive, a CPU performs an offset correcting operation in positioning control mode after a seek operation, using an offset value set on the basis of the HETS phenomenon from a memory when data is recorded.

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patent: 7-29321 (1995-01-01), None
patent: 11-66509 (1999-03-01), None
patent: 2002-93083 (2002-03-01), None
Hiroaki Muraoka et al., “200 kFRPI Data Recording Using a Novel Bi-Layered Head in Perpendicular Magnetic Recording,” IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993, pp. 4074-4076.
Austrian Search Report dated Apr. 8, 2005 for Singapore Appln. No. 200404391-5.

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