PURPOSE: To facilitate position adjustment of home position switches in the disk drive device and to reduce power consumption.

CONSTITUTION: A head carriage 1 mounted with a head 2 for writing and reading data, etc., on a discoid recording medium is driven. In this disk drive device, when it is detected that a power source is turned on by a power-on reset circuit 18 or a cassette detecting switch 19 is operated, atuo-recalibration is performed, and home position detection is also performed only at the time of this recalibration.