In one embodiment, a needle guide is attached to the end of an ultrasonic probe in a manner such that the needle will follow a known trajectory under control of the needle guide. The sector is used to store information related to one or more tests that may be performed on the disk drive andor on other devices of a computer system in which the disk drive is located. Thus, it is possible to alleviate a rub between the photosensitive drum 3 and a conveyance belt 8 at the time when jamming is cleared, and to suppress generation of scratches on the photosensitive drum 3 and a surface of the conveyance belt 8. An inlet tube to the crucible being provided to supply an oxidizing gas to a melt zone.