Patent ID: 7365930
Filing Date: 2008-04-29
Classification: G11B

Abstract:
1. A magnetic disk drive comprising: a magnetic disk; a motor coupled to said magnetic disk and causing the magnetic disk to rotate; a magnetic head for writing and reading data to and from said magnetic disk; a suspension having a projection at a front end thereof and supporting said magnetic head; a ramp having a slope where said projection goes up, at an outer edge portion of said magnetic disk, and a withdrawal region contiguous to said slope; a heater for heating said ramp; and a temperature sensor for detecting the temperature of said ramp; wherein it is determined whether or not the temperature detected by said temperature sensor has reached a preset temperature upon start-up of said motor, if the temperature has not reached the preset temperature, said ramp is heated by said heater, and if the temperature of said ramp has reached the preset temperature, a read or write operation of said magnetic head is started.