Patent ID: 7564653

Claim:
A magnetic disk drive apparatus comprising: a magnetic disk; a ramp mechanism; a pair of magnetic head sliders each having a magnetoresistive effect read head element; and a load/unload means for retracting said pair of magnetic head sliders to said ramp mechanism under unloading states and for putting said pair of magnetic head sliders back to face front and back surfaces of said magnetic disk respectively under loading states, said ramp mechanism having head resting portions and a pair of permanent magnets, said pair of magnetic head sliders respectively resting in said head resting portions in a manner to face to each other during unloaded states, said pair of permanent magnets generating a closed loop magnetic field applied to said pair of magnetic head sliders rested in the respective head resting portions, the magnetic fields applied to the respective magnetic head sliders being in opposite directions along the track width of the magnetic head sliders.