Magnetic recording disk drive

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Details

C360S078040, C360S078070, C360S060000

Reexamination Certificate

active

06879460

ABSTRACT:
A magnetic recording disk drive can prevent the deterioration of the head off-track characteristics and the reduction of the drive performance even when an erase band asymmetry resulting from a skew angle exists. A write inhibit slice value for an inner peripheral side offset is made smaller than a write inhibit slice value for an outer peripheral side offset at a position where an erase band on the inner peripheral side is greater than an erase band on the outer peripheral side, so that the adjacent track on the outer peripheral side cannot easily erase a data track. On the contrary, the inner periphery and the outer periphery are paraphrased at a position where the erase band on the outer peripheral side is greater than the erase band on the inner peripheral side.

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IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993, “Recording Asymmetries at Large Skew Angles”, K. Wiesen et al, pp. 4002-4004.
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IEEE Transactions on Magnetics, vol. 34, No. 4, Jul. 1998, “Optimal Track-Width Design of AMR/GMR Heads for High-Track-Density Disk Drives”, F. Tomiyama et al, pp. 1970-1972.

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