A header information acquiring section is operable to acquire header information of reproduction data to be reproduced from a hard disk. A bit rate information extracting section is operable to extract information on a bit rate at which the reproduction data is reproduced, from the acquired header information. A comparison section is operable to compare the extracted bit rate with a predetermined threshold value. A drive control section is operable to deactivate the hard disk and activate the deactivated hard disk based on the comparison result of the comparison section.

 
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> Disk drive and disk drive control method

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