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PATENT ABSTRACTS OF JAPAN 



(1 1 publication number : 2000-149449 
(43)Date of publication of application : 30.05.2000 



(51)IntCI. 




G11B 20/12 






G11B 7/004 








G11B 20/10 




(21 application number 


11-320854 


(71)Applicant 


LG ELECTRONICS INC 


(22)Date of filing: 


11.11.1999 


(72)Inventor : 


YON CHORU PAKU 



(30)Priority 

Priority number : 98 9848268 Priority date : 1 1 .1 1 .1 998 Priority country : KR 
98 9848371 12.11.1998 KR 



(54) SPARE AREA ASSIGNING METHOD FOR OPTICAL RECORDING MEDIUM 

(57)Abstract: 

PROBLEM TO BE SOLVED: To dispense with a utility 
such as a defragmentation by deciding the maxium size 
which is usable as an auxiliary spare area and assigning 
the auxiliary spare area while making sizes of increase 
portions changable within the usable size. 
SOLUTION: When a spare area SA-pri to be used when 
a defect is generated in a user area becomes full, a new 
spare area, that is, an auxiliary spare area SA-sup is 
assigned again at the termination of the user area. When 
assigning of the auxiliary spare area SA-sup is executed 
only one time, the size of the area SA-sup is made to be 
the maximum usable size or a size equal to or small than 
this size. In the case of assigning an auxiliary spare area 
SA-sup while dividing it into variable sizes several times 
at necessary times within the usable size, increase 
portions to be extended are not constant sizes and they 
are changed. In this case, after the area extended earlier 
is fully used, a next extended area is activated. 




http://www19.ipd^ 2008-05-31 



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