JPH03259324A - Copying system for unloadable medium - Google Patents

Abstract

PURPOSE:To copy only an added part by retrieving an area in which no data is described on the file data area of an output medium based on extracted file managing information, and performing the copy of read data according to the area. CONSTITUTION:A file managing information means 21 performs the reading and comparison of a piece of file managing information of an input medium 1 and that of file information of the output medium 2, respectively. Such operation is performed until no file managing information exists in the medium 12. When coincidence is obtained between the file managing information of the medium 12 and that of the medium 11, execution is delivered to an additional file managing in formation extraction means 22. The means 22 extracts information not including the file managing information of the medium 12 in the file managing information of the medium 11 i.e. the information added on the medium 11. A copying target area detecting means 23 retrieves the area where no data is described by retrieving the area of the medium, and sets it as a copying target area. A copying means 24 inputs file data from the medium 11 according to the copying target area, and copies it on the medium 12.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for copying non-rewritable media.

[Conventional technology]

Conventionally, in a copying method for a non-rewritable medium such as an optical disk, the entire copy is manually performed from the medium to the output medium only for the first time immediately after the output medium is initialized.

[Problem to be solved by the invention]

The conventional copying method for non-rewritable media described above only copies the entirety, not parts. Even if there is an unused area on the output medium, it is possible to copy additionally to it. could not.

In other words, there is a drawback that copying cannot be performed unless the output medium is copied for the first time immediately after initialization.

For this reason, a non-rewritable medium that has been copied once could no longer be used for copying, and a new medium was required each time a non-rewritable medium was backed up.

In view of the above-mentioned points, an object of the present invention is to provide a copying method that copies only the added portion of the input medium to an output medium even if an addition is made to the input medium after the second copy has been performed. It is in.

[Means to solve the problem]

The non-rewritable medium copying method of the present invention includes a file management information comparing means for comparing file management information of an input medium and file management information of an output medium, and file management information of an output medium in the file management information of the input medium. an additional file management information extraction means for extracting file management information added from the file management information; and an additional file management information extraction means for extracting file management information added from the file management information; The apparatus includes a copying target area search means for searching for an area that is not covered by a copy target area, and a copying means for copying data read from an input medium to an output medium according to the copy target area.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an additional partial copying method for a non-rewritable medium according to an embodiment of the present invention.

Input medium 11 is a non-rewritable input medium, output medium 1
Reference numeral 2 denotes a non-rewritable output medium, and file management information comparing means 21.2 compares the file management information of the input medium and the file management information of the output medium. Additional file management information extraction means 22 for extracting file management information added from the file management information of the output medium in the file management information of the input medium. A copy target area search means 23 searches for an area in which no data is written in the file data area of the output medium compared to the file data area of the input medium based on the extracted file management information, and the input medium according to the copy target area. The copying means 24 includes a copying means 24 for reading the data and copying it onto an output medium, and is connected to a control section 20 that controls these.

The file management information comparing means 21 reads the file management information of the input medium 11 and the file management information of the output medium 12 one by one and compares them. Output medium 1
Execute until the file management information in step 2 is exhausted. When all the file management information on the output medium 12 matches the file management information on the input medium 11, execution is shifted to the additional file management information extraction means 22.

The additional file management information extraction means 22 extracts file management information that is not included in the file management information of the output medium 12 from among the file management information of the input medium 11, that is, file management information added to the input medium 11.

The copy target area search means 23 searches the file data area of the output medium 12 based on the extracted file management information,
An area where no data is written is searched and set as a copy target area. The copying means 24 inputs file data from the input medium 11 according to the area to be copied, and copies it to the output medium 12.

Once all files have been copied, the file management information area is also treated as a file. By executing the copy target area search means 23 for this file to search for a copy target area, and by executing the copy means 24 to copy from the input medium 11 to the output medium 12, file management information is also obtained. Copies can be made.

Therefore, the output medium 12 becomes a medium having the same contents as the input medium 11, and the copying is completed.

〔Effect of the invention〕

As explained above, in the present invention, even if the output medium is not immediately initialized, if the file management information of the input medium is added to the file management information of the output medium, only the added portion can be copied. .

- If a copy is made from an input medium to an output medium for backup purposes, the output medium becomes equal to the input medium by repeating the copy any number of times, and can be used for backup purposes.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an additional partial copying method for a non-rewritable medium according to an embodiment of the present invention. 11... Input medium, 12... Output medium, 20...
Control unit, 21...File management information comparison means, 22.
. . . Additional file management information extraction means, 23 . . . Copy target area search means, 24 . . . Copying means.

Claims (1)

[Scope of Claims] File management information comparing means for comparing file management information of an input medium and file management information of an output medium; Additional file management information extraction means for extracting file management information; Based on the extracted file management information, searches for an area in which no data is written in the file data area of the output medium compared to the file data area of the input medium. 1. A method for copying a non-rewritable medium, comprising: means for searching for a region to be copied; and a copying means for copying a region to be copied from an input medium to an output medium.