| 摘要 |
A recording and reproducing device, which records and reproduces information on and from a rewritable recording medium having absolute addresses and comprising an information recording area wherein information entered from external devices is recorded and a TOC area wherein additional information with respect to the information recorded in the information recording area is recorded, comprises: an optical head and an electromagnet for recording information in the information recording area, and for recording in the TOC area the absolute addresses indicating at least the recording positions of information as additional information every time the information is recorded in the information recording area; a display section for graphically displaying the recorded and unrecorded ranges of the information recording area independently according to the absolute addresses recorded in the TOC area with respect to the recording positions of each piece of information; warning means for warning to show that a position has already been occupied by referring to the additional information recorded in the TOC area when it is instructed to record new information in the position of the information recording area where another information has already been recorded; first editing means for erasing the additional information from the TOC area with respect to any information within the information recording area when the information is completely erased therefrom; and second editing means for detecting a remaining amount of any information when the information is partially erased from the information recording area, for recording in the TOC area absolute addresses indicating the recording positions of the remaining information part in the TOC area, after replacing the absolute addresses indicating the recording positions of its original information with those indicating the recording positions of the remaining information part when the remaining amount is not less than a predetermined value, and for erasing the additional information of the partially erased information from the TOC area when the remaining amount of the partially erased information is less than the predetermined value. With the arrangement, even if the stored additional information is lost due to the cut-off of the power source, in the recording operation thereafter, the user can accurately recognize the recording conditions of the information recording area, and such trouble as to record another information overlapping with information already recorded is perfectly prevented, and further the user can recognize space domains easily and accurately. |
