Data storage apparatus with compensation for vibration and...

Details Data storage apparatus with compensation for vibration and... Data storage apparatus with compensation for vibration and...

2006-11-28

2006-11-28

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

With compensating features

C318S629000, C360S075000

Reexamination Certificate

active

07141951

ABSTRACT:
Embodiments of the invention provide a data storage apparatus and its control method capable of accurately reading/writing data. In one embodiment, a data storage apparatus comprises: a servo control section which, based on servo data stored on the storage medium, generates servo control data to control the position of the head; a sensor to detect vibration; a compensation data generating section which generates compensation data to compensate for the head's position error caused by vibration; a drive signal generating section which can generate a drive signal to move the head based on the servo control data; an arithmetic processing section which calculates a rating value to evaluate the level of vibration given to the data storage apparatus wherein the rating value is calculated by using a plurality of sensor output values indicative of the detected level of vibration; and a determination processing section which, according to the updated rating value, determines whether to perform the compensation using the compensation data; wherein the drive signal generating section compensates the servo control data using the compensation data in generating the drive signal.

REFERENCES:
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patent: 2003/0231423 (2003-12-01), Semba et al.
patent: 2004-152353 (2004-05-01), None

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