An information processing apparatus is disclosed. The information
processing apparatus includes a hard disk drive, an acceleration sensor,
a determination section, and a threshold value setup section. The hard
disk drive is capable of retracting a head to a data-free landing zone.
The acceleration sensor detects acceleration. The determination section
obtains high frequency components from acceleration information detected
by the acceleration sensor, obtains a vibration level corresponding to
the obtained high frequency components, compares the vibration level with
a threshold value which has been set up, and determines whether or not
there is a necessity to retract the head of the hard disk drive to the
data-free landing zone. The threshold value setup section allows a user
to change the threshold value and set up the changed threshold value.