Method of controlling rotation of optical recording medium...

Details Method of controlling rotation of optical recording medium... Method of controlling rotation of optical recording medium...

2006-04-18

2006-04-18

Patel, Gautam R. (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053350, C369S053140, C369S047390

Reexamination Certificate

active

07031242

ABSTRACT:
A storage apparatus rotates an optical recording medium at two or more kinds of rotational speeds. The rotational speed is decreased when a read or write margin becomes less than or equal to a first predetermined value or, when a frequency of generation of a servo abnormality of a tracking servo and/or a focus servo is greater than or equal to a first predetermined frequency. On the other hand, the rotational speed is increased when the read or write margin becomes greater than or equal to a second predetermined value or, when the frequency of generation of the servo abnormality of the tracking servo and/or the focus servo is less than or equal to a second predetermined frequency.

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