| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent information from being destroyed due to an operation to rearrange data recorded on a recording medium. SOLUTION: This device is provided with a first power supply means and a second power supply means, and when both the first power supply means and the second power supply means are put in a normal state, and also this device is put in a stand-by state, the rearranging operation of the recording position of information recorded on a recording medium is executed. Thus, it is possible to prevent the danger of battery exchange or battery consumption or unexpected power failure, and to prevent an accident that the information on the medium is destroyed while the rearranging operation of the information is executed.
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