Disk device and seek control method

Details Disk device and seek control method Disk device and seek control method

2005-09-06

2005-09-06

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078070, C360S075000

Reexamination Certificate

active

06940684

ABSTRACT:
When a head passes over a track with a projected item in a seek operation, the CPU delays a seek start time to conduct the seek by changing a period of time from a seek start position to a position of the track with a projected item. Or, the CPU conducts seek control by changing a speed table. Or, the CPU changes a sequence of items of a tag queue to obtain a seek locus not passing the projected item. By the control operation, a seek error due to thermal asperity is prevented and the head is not damaged. This also prevents appearance of a new projected item produced by contact between the magneto-resistive head and the projected item on the recording medium.

REFERENCES:
patent: 5268884 (1993-12-01), Kiuchi et al.
patent: 5796546 (1998-08-01), Sasamoto et al.
patent: 5870241 (1999-02-01), Ottesen et al.
patent: 6339811 (2002-01-01), Gaertner et al.
patent: A-7-320216 (1995-12-01), None

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