Information storage device, write current adjustment method...

Details Information storage device, write current adjustment method... Information storage device, write current adjustment method...

2006-06-14

2009-10-27

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

C360S031000, C360S046000

Reexamination Certificate

active

07609470

ABSTRACT:
There is provided a magnetic disk device or the like which is capable of improving signal quality by suppressing occurrence of erasure of adjacent tracks due to spreading of a writing spot. The magnetic disk device is capable of controlling a steady state value of a write current for writing into a magnetic disk, an overshoot value, or a width thereof. The magnetic disk device comprises a VMM measurement section that measures a VMM, and a write current setting section that sets the write current, based on a value of the VMM measured by the VMM measurement section, such that a data writing spot is prevented from spreading during writing into the medium and occurrence of side erasure is prevented.

REFERENCES:
patent: 6064534 (2000-05-01), Simozato
patent: 6449110 (2002-09-01), DeGroat et al.
patent: 2004/0169953 (2004-09-01), Yun et al.
patent: 2004/0174627 (2004-09-01), Kim et al.
patent: 2005/0264909 (2005-12-01), Lee et al.

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