As the head can be used to read and write messages quickly hopes of finding any point on the disk, so you can access information on the disk directly.
由于用来读写信息的磁头能很快地寻到磁盘上的任何一点，因此，磁盘上信息的存取可以直接进行。
A head crash happens when the surface of the read-write head or particles on its surface contact the magnetic disk surface.
当读写头的表面或表面上的微粒与磁盘表面接触时会发生磁头划伤。
A head crash happens when the surface of the read-write head or particles on its surface contact the magnetic disk surface.
当读写头的表面或表面上的微粒与磁盘表面接触时会发生磁头划伤。
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