| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the power consumption of an HDD, and to reduce a noise. SOLUTION: A control part 200 in an HDD controller 100 caches a part or whole part of data to be recorded in an HDD for cache, and transfers the data to an HDD for preservation so that the data can be preserved, and that data to be reproduced can be reproduced from the HDD for cache or the HDD for preservation. Also, a power source managing part 400 in the HDD controller 100 always turns on the power source of the HDD for cache, and turns on the power source of the HDD for preservation only at the time of performing access to the HDD.</p> |
