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PATENT ABSTRACTS OF JAPAN 



(1 1 )Publication number : 02-054327 
(43)Date of publication of application : 23.02.1990 



(51)Int.CI. 


606F 3/08 
G06F 3/06 
61 IB 27/00 




(21)Application number : 63-206887 


(71)Appiicant 


VICTOR CO OF JAPAN LTD 


(22)Date of filing : 19.08.1988 


(72)Inventor : 


KITAMURA KUNIKO 



(54) CONTROL SYSTEM FOR DISK DATA 

(57)Abstract: 

PURPOSE: To set a postscript type disk under tlie same 
control as a reversible medium of a general-purpose 
operating system by updating a file allocation table and 
all areas of a directory for each sector and adding 
together the final information of each configuration 
sector to refer the whole area. 

CONSTITUTION: The file allocation tables(FAT) 10 and 
the directory areas 1 1 are added and updated every time 
a file is read and written. Then the logical sector 
numbers is read out of the pointers for each sector 
when the FAT part 10 is read. If this pointer is equal to 
ϕ, i.e., no data is written, the initialization 
information is sent to a system. When the FAT part 10 is 
written, the logical sector addresses are written out of 
the pointers for each sector. Then an address is newly 
set by reference to a pointer in the case the pointer is 
equal to ϕ. The areas 1 1 are updated in the same 
way as the FAT 10. Then the information to be newly 
stored and added are recorded to the new sector 

following the recorded sector for each sector. Then the final information of each configuration 
sector are added together for reference to the entire area. 



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