MOUNTING METHOD FOR STORAGE MEDIUM

1 . A storage-medium mounting method comprising:

detecting a rotation center axis of a rotor by rotating the rotor relative to a stator, the rotor being rotatably supported by the stator; and

mounting a storage medium on the rotor while aligning a center axis of the storage medium with the rotation center axis of the rotor.

2 . The storage-medium mounting method according to claim 1 , wherein the storage medium is mounted with further reference to a tilting angle of a center axis of the rotor relative to a center axis of the stator, the tilting angle being defined at a time that the rotor is not rotating.

3 . The storage-medium mounting method according to claim 2 , further comprising:

providing a fluid bearing between the rotor and the stator that contributes to the tilting angle of the center axis of the rotor.

4 . A storage-medium mounting method comprising:

detecting an amount of deviation of a center of gravity of a rotor from a center axis of a stator by rotating the rotor relative to the stator, the rotor being rotatably supported by the stator; and

mounting a storage medium on the rotor while deviating a center axis of the storage medium from the center axis of the stator in accordance with the amount of deviation in a direction opposite a direction in which the center of gravity of the rotor deviates from the center axis of the stator.

5 . The storage-medium mounting method according to claim 4 , wherein the storage medium is mounted with reference to a tilting angle of a center axis of the rotor relative to the center axis of the stator, the tilting angle being defined at a time that the rotor is not rotating.

6 . The storage-medium mounting method according to claim 5 , further comprising:

providing a fluid bearing between the rotor and the stator that contributes to the tilting angle of the center axis of the rotor.

7 . The storage-medium mounting method according to claim 4 , wherein detecting an amount of deviation of the center of gravity of the rotor comprises:

detecting an acceleration of the rotor as the rotor is rotating; and

detecting the amount of deviation of the center of gravity of the rotor based on the detected acceleration of the rotor.

8 . A storage-medium driving apparatus comprising:

a motor that includes a stator and a rotor, the rotor rotatably supported by the stator;

a storage medium mounted on the rotor such that a center axis of the storage medium is aligned with a rotation center axis of the rotor, wherein the rotation center axis of the rotor is a center of an axis of rotation of the rotor during a rotation of the rotor relative to the stator.

9 . The storage-medium driving apparatus according to claim 8 , wherein:

at stationary position, a center axis of the rotor is tilted at a tilting angle relative to a center axis of the stator.

10 . The storage-medium driving apparatus according to claim 9 , wherein the motor further includes a fluid bearing provided in between a surface of the rotor and a surface of the stator.