Head position calculation method in magnetic disc apparatus

Details Head position calculation method in magnetic disc apparatus Head position calculation method in magnetic disc apparatus

2007-02-06

2007-02-06

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

11262896

ABSTRACT:
When a sub-track having burst data A and D, a sub-track having burst data A and C, a sub-track having burst data B and C, and sub-track having burst data B and D are repeatedly arranged in this order, in accordance with equations 1 and 2, a sub-track t included in a track T determines the value of a constant n within a range of 1.2 (inclusive) to 1.8 (inclusive) so as to obtain linearity between a position in a disc radial direction r and a head position P in a disc radial direction r in the sub-track t. Subsequently, the head position P is calculated using the determined constant n and equations 1 and 2:in-line-formulae description="In-line Formulae" end="lead"?P=(A−B)*|A−B|(n−1)/(|A−B|n+|C−D|^n)  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?P=(C−D)*|C−D|(n−1)/(|A−B|n+|C−D|n)  (2)in-line-formulae description="In-line Formulae" end="tail"?

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