Recording and/or reproducing apparatus, medium, and method controlling a write speed
AssigneeToshiba Samsung Storage Technology Korea Corporation
InventorsKun-ho Yun, Jong-tae An
Life of this patent
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Abstract
A recording and/or reproducing apparatus, medium, and method controlling a write speed of a disk drive. The method may includes measuring a predetermined disk quality evaluating factor affecting a servo control performance in multiple areas of a disk, determining an optimal write speed of the areas of the disk corresponding to the disk quality evaluating factor, and controlling a rotation speed of the disk at an optimal write speed of a corresponding area of the disk, depending on a position of the disk in which writing is to be performed, in a writing mode.
Claims28
A method for controlling a write speed of a recording and/or reproducing apparatus, comprising:
- measuring a medium quality evaluating factor affecting a servo control performance in a plurality of areas of a medium;
- determining respective optimal write speeds for the plurality of areas of the medium based on a respective medium quality evaluating factor;
- storing the respective optimal write speeds for the plurality of areas of the medium in a memory;
- and
- controlling, in a writing mode, a rotation speed of the medium at an optimal write speed, from the determined optimal write speeds read from the memory, for a corresponding area of the medium, of the plurality of areas, to which writing is to be performed
- wherein if the medium is a multilayer disk, corresponding optimal write speeds for innermost and outermost perimeter areas of the medium are determined so as to be lower than a standard write speed, determined during a design/manufacturing stage or outside of the writing mode of the recording and/or reproducing apparatus, by a predetermined write speed, and corresponding optimal write speeds in other areas of the disk are optimally determined based on the medium quality evaluating factor.
A recording and/or reproducing apparatus comprising:
- a controller to determine a position of a pickup over a medium during a writing mode, obtain a corresponding optimal write speed information stored in a memory based on the determined position of the pickup, with obtainable optimal write speeds having been individually assigned particularly for each of a plurality of areas of the medium and stored in the memory, and generate a control signal based on the obtained optimal write speed read from the memory to control a rotation of the medium,
- wherein the controller measures a medium quality evaluating factor for each of the plurality of areas of the medium, analyzes the medium quality evaluating factor to determine the obtainable optimal write speeds for each of the plurality of areas of the medium, and
- wherein if the medium is a multilayer disk, obtained optimal write speeds in innermost and outermost perimeter areas of the medium are determined so as to be lower than a standard write speed, determined during a design/manufacturing stage or outside of the writing mode of the recording and/or reproducing apparatus, by a predetermined write speed, and obtained optimal write speeds in other areas of the medium are optimally determined based on the medium quality evaluating factor.
A method for controlling a write speed of a recording and/or reproducing apparatus, comprising:
- determining optimal write speeds for a plurality of areas on a medium;
- storing the optimal write speeds in a memory;
- and
- controlling rotation speeds of a medium at respective optimal write speeds for corresponding areas of the medium during writing to the respective corresponding areas, based on the optimal write speeds read from the memory;
- wherein the respective optimal write speeds are distinguishable from standard write speeds for the medium determined during a design/manufacturing stage or outside of the writing mode of the recording and/or reproducing apparatus and
- wherein if the medium is a multilayer disk, corresponding optimal write speeds for innermost and outermost perimeter areas of the medium are determined so as to be lower than the standard write speed, by a predetermined write speed, and corresponding optimal write speeds in other areas of the disk are optimally determined based on the medium quality evaluating factor.
Dependencies are inferred from the claim text.