| 摘要 |
PROBLEM TO BE SOLVED: To provide a data recording disk and a hard disk drive having the same. SOLUTION: The hard disk drive has a spindle motor 130, at least one data recording disk 120 which is mounted on the spindle motor 130 and an actuator 140 which moves a reading/writing head to a prescribed position on the disk 120. The disk is provided with a center hole 122, a ring shaped clamping zone 124 arranged at the circumference of the center hole 122 and a data zone 126 which is arranged outside the clamping zone 124. A plurality of protrusions 128 are formed in the clamping zone 124. Due to the increased friction force between the clamping zone 124 of the disk and a clamp 136, occurrence of slipping of the disk caused by a shock is prevented. COPYRIGHT: (C)2006,JPO&NCIPI
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