Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
1998-05-28
2001-03-06
Psitos, Aristotelis M. (Department: 2752)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S084000
Reexamination Certificate
active
06198708
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a disk driving device having a function which records and reproduces data on and from a rewritable disk, erases recorded data in the rewritable disk, and executes an finalizing operation for disabling the disk from recording.
Conventionally, there has been known a disk driving device (hereinafter referred to as a CD-RW (CD rewritable) driving device) which records various data and reproduces the recorded data on and from a CD-RW disk (i.e. an optical disk in which data can be repeatedly written in, read out, and erased). In the CD-RW driving device of this sort writes address information concerning tracks such as a starting time and a stopping time of the track, on a program memory area (hereinafter referred to as a PMA) which is located at an inner radius of the disk before or after recording the data.
When the CD-RW disk is loaded in the above-mentioned CD-RW driving device, a CD-RW drive collects address information concerning the tracks existing in the PMA of the CD-RW disk, thereby the CD-RW drive recognizes address information concerning all the tracks on the disk, and then, prepares to record and reproduce the data on and from the track based on the address information. The address information concerning tracks is recorded in the PMA at sector by sector.
However, in the conventional CD-RW driving device, when a CD-RW disk has no more data to be added after required data is already written in, the CD-RW disk is finalized, so the finalized disk becomes disabled from being recorded additionally. The disk having been finalized, data of the disk cannot be erased even in the case that the data becomes no more needed. Accordingly, the finalized disk cannot effectively be used as media source for recording data.
SUMMARY OF THE INVENTION
This invention is made to solve the above-mentioned problems. One object of the present invention is to provide a disk driving device having a drive which forcibly erases data of a rewritable disk even if a finalization disables the disk from being written to, thereby making disk usable again.
In order to accomplish the above-mentioned object, according to one aspect of the present invention, a disk driving device having a disk drive which records retrieves data data on and from a rewritable disk, comprises: an erasing means which executes a procedure for erasing recorded data on said rewritable disk which is loaded into the disk driving device; a finalizing means which executes a finalizing operation inhibits writing to which the disk; a judgment means which judges whether a rewritable disk has already been finalized, in the erasing procedure by said erasing means; and, a formatting means which forcibly executes a formatting of the disk that has been finalized.
According to another aspect of the present invention, a disk driving device having a disk drive which records and reproduces data on and from a rewritable disk, comprises: a first judgment means which judges the type of the disk loaded in the drive in a data erasing procedure; a second judgment means which, when said first judgment means judges the disk to be a rewritable disk, judges whether or not the rewritable disk has already been finalized; and, a formatting means which forcibly executes a formatting of the disk when the second judgment means judges that the disk has already been finalized.
REFERENCES:
patent: 5644444 (1997-07-01), Braithwaite et al.
patent: 4-232664 (1992-08-01), None
patent: 5-36196 (1993-02-01), None
Microsoft® Windows™ version 3.0 (c) 1985-1990, p. 138-139.
Funai Techno-Systems Co., Ltd.
Morgan & Lewis & Bockius, LLP
Psitos Aristotelis M.
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