Data recording medium and data recording/reproducing device with increased storage capacity
AssigneeMitsubishi Chemical Corporation
InventorsYuzo Seo, Hiroyuki Ikeda
Life of this patent
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Abstract
A recording disk has a data area and a servo-burst area alternately arranged with each other in the circumferential direction of the disk. The servo-burst area has a servo-burst pattern having signal sections and non-signal sections arranged with a period λ in the radial direction of the disk. The period λ is expressed by λ=2p×n/m in terms of track pitch “p” of the disk, wherein n and m are integers prime to each other provided that n/m<2.
Claims16
A recording medium for storing data to be reproduced by a plurality of recording/reproducing heads, said recording medium comprising:
- a plurality of data tracks extending in a moving direction of said recording medium and arranged with a track pitch “p” in a normal direction perpendicular to said moving direction, each of said data tracks having a plurality of data blocks arranged in said moving direction, a plurality of said data blocks arranged in said normal direction forming a data area;
- and
- a servo-burst area disposed between each adjacent two of said data area and having a signal pattern arranged in a single column or two columns extending in said normal direction, said servo-burst area including a periodic servo-burst pattern having a period λ in said normal direction, wherein λ=2p X n/m, given n and im being natural numbers and prime to each other, with a relationship n/m<2 therebetween.
A recording medium comprising:
- a plurality of data tracks extending in a moving direction of said recording medium and arranged with a track pitch “p” in a normal direction perpendicular to said moving direction, each of said data tracks having a plurality of data blocks arranged in said moving direction, a plurality of said data blocks arranged in said normal direction forms a data area;
- and
- a servo-burst area disposed between each adjacent two of said data area and having a signal pattern in a single column or two columns extending in said normal direction, said servo-burst area including a periodic servo-burst pattern having a period λ in said normal direction, wherein λ=4p/m, given m being a natural number and prime to the number 2, with a relationship m>1.
A recording medium comprising:
- a plurality of data tracks extending in a moving direction of said recording medium and arranged with a track pitch “p” in a normal direction perpendicular to said moving direction, each of said data tracks having a plurality of data blocks arranged in said moving direction, a plurality of said data blocks arranged in said normal direction forms a data area;
- and
- a servo-burst area disposed between each adjacent two of said data area and having a signal pattern in a single column or two columns extending in said direction, said servo-burst area including a periodic servo-burst pattern having a period λ in said normal direction, wherein λ=4p/m, given m being a natural number and prime to the number 2, with a relationship m>1 and said servo-burst pattern includes signal sections and non-signal sections alternately arranged in said normal direction, and each of said signal sections and each of said non-signal sections have lengths of W1 and W2 where a relationship W21<W1 holds therebetween.
The recording medium as defined in claims, wherein said servo-burst pattern has a protrusion and depression alternately arranged with said period λ.
Dependencies are inferred from the claim text.