The magneto-optic head flies much farther from the disk surface than a magnetic disk head, and the magnetic material is covered with a protective layer of plastic or glass;
光电磁头距离盘面的距离比磁头远，并且磁介质上覆盖有塑料或玻璃的保护层；
That also mean that the head must be closer to the disk or the magnetic field may influence the surrounding sectors.
这也表明磁头需要更紧地贴着盘片读取数据，或者磁场也可能影响到周围的扇区。
When the disk rotation speed increases the stability of magnetic head is slightly worsened.
高转速的磁盘对磁头稳定性不利，但影响不大。
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