Magnetic disk drive for compensating repeatable runout error

Details Magnetic disk drive for compensating repeatable runout error Magnetic disk drive for compensating repeatable runout error

2005-05-24

2005-05-24

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S060000

Reexamination Certificate

active

06898047

ABSTRACT:
In order to achieve narrow track pitch by measuring, storing and compensating common average values for repeatable runout components between adjacent tracks in a head positioning control system for a magnetic disk drive, a compensation signal is calculated for the average value of the repeatable runout of each servo sector of at least two tracks of servo information reproduced from a magnetic disk, on the basis of an inverse function of the sensitivity characteristics of the tracking control system. The compensation signal is stored, and thereafter used for compensating the servo signal.

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