| 摘要 |
In a data recording/reproducing unit, an identification of the storage unit is validated, to prevent circumvention of copy protection by unauthorized replacement of the storage unit. For example, when the power of a television receiver 100 is turned on for the first time, the controller 150 reads out a HDD serial number stored in a HDD 140, and then writes the number to a flash memory 160. While the receiver 100 is ON, the controller 150 acquires the HDD serial number stored in the HDD 140 periodically or every time there is an attempt to access the HDD 140. Then, the controller 150 compares the acquired HDD serial number to the HDD serial number in the flash memory 160. If the result of the judgment is negative, the controller 150 disallows the use of the HDD 140.
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