根据这些个信息，控制系统可以向盘片驱动系统发送提速或降速的指令。
With this information, control can send speed up or slow down commands to the disc drive motor.
盘片上均匀地涂上一种极薄的磁性材料，并按指定格式化，就成了保存信息的磁盘。
Disc evenly coated with a kind of very thin magnetic material, according to the specified format, it becomes a disk to save information.
盘片上存储的宝贵信息，你可以看到在图片顶部盘片。
Precious information stored on platters, you can see top platter on the picture.
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