Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1997-09-23
2000-10-24
Cabeca, John W.
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
711207, 36518511, G06F 1200
Patent
active
061382035
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an information processor and a method of information processing, and more particularly to an information processor and a method of information processing wherein information is recorded on, for example, a write-once type disc-like recording medium.
BACKGROUND ART
Conventionally, as a large volume data recording medium, a read only medium which is called a CD-ROM (Compact Disc-Read Only Memory) is available. There is available a write-once type disc-like recording medium called Compact Disc-Recordable (CD-R) in which data can be recorded only once by forming a recording layer on the CD-ROM.
This CD-R can be played back by using a conventional CD-ROM drive so that all the data is recorded and prepared, for example, on a hard disc with the result that the CD-R in which writing is completed can be used as a CD (Compact Disc) by writing all the data in the CD-R.
By the way, since the CD-R having such a constitution can be written only once, it is difficult to rewrite the data in an area where data is written once in the same area so that it is difficult to use the CD-R as a rewritable recording medium like a so-called floppy disc.
In the case where recorded data is renewed with a write once disc type CD-R disc, it is difficult to rewrite an area which has been once written. Consequently, work is required to rewrite the renewed data on a new area in this case. Due to such characteristics of the write once type recording medium, in the case where an attempt is made to rewrite data by using the write once type CD-R disc, the usable residual capacity of the CD-R disc will be decreased with the result that there arises a problem in that it becomes difficult to write the data which is about to be renewed on the memory once there is no room for the usable capacity.
The present invention has been made in view of the aforementioned problem, and the invention provides an information processor and a method of information processing wherein the write once type recording medium can be used as if the recording medium was a rewritable type recording medium and the usable residual capacity can be monitored.
DISCLOSURE OF THE INVENTION
The present invention comprises control means for allowing a physical position which is recorded on a medium to correspond to a logical position, generating a correspondence table between the logical position and the physical position thereby controlling, upon the physical position being changed, the correspondence relation between the logical position and the physical position after the change, recording means for recording the file data in the memory and the element data of the correspondence table as written data, calculating means for calculating a writable residual capacity of the medium, comparing means for comparing written data amount in the memory with the writable residual capacity, and outputting means or outputting the result of the detected surplus as the surplus detection result when the surplus is detected.
Furthermore, the invention allows the control means to immediately record the written data in the memory on the medium when the surplus detection result is output.
Furthermore, the information processor of the invention provides warning means for displaying a warning to a predetermined display means when the surplus detection result is output.
Furthermore, the invention comprises the steps of: allowing a physical position which is recorded on a medium to correspond to a logical position, generating a correspondence table between the logical position and the physical position thereby controlling, upon the physical position being changed, the correspondence relation between the logical position and the physical position after the change; recording the file data in the memory and the element data of the correspondence table as written data; calculating a writable residual capacity of the medium, comparing written data amount in the memory with the writable residual capacity, and outputting the result of the detected surplus as
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Inokuchi Tatsuya
Kaneko Yasuyoshi
Udagawa Osamu
Cabeca John W.
Moazzami Nasser
Sony Corporation
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