A rotation speed of a disk-type storage medium is suitably controlled in
order to save power and to reduce noise in a disk-type storage medium
driving apparatus provided with one or more communication interfaces. A
disk-type storage medium driving apparatus that can switch rotation speed
of a disk-type storage medium, to drive the disk-type storage medium,
includes one or more communication interface units, which perform data
transfer to and from peripheral devices; and a control unit that judges
necessity of switching a rotation speed of the disk-type storage medium
when there occurs a data transfer request through one of the
communication interface units.