Disk drive apparatus

摘要

To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.