这是特别有用的那些谁失去了他的驱动程序磁盘或光盘驱动器。

It is especially useful to those who have lost his Driver Disk or Driver CD.

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实际上，缓冲可能发生在其它不同的级别，例如硬盘本身、控制器或内核磁盘驱动设备驱动程序，所以我们的工作可能对性能影响不大。

In practice, buffering may occur at various other levels, such as on the hard disk itself, the controller, or the kernel disk drive device driver, so ours may not make much of a difference.

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甚至物理卷本身也是逻辑层的一部分，因为物理层仅包含实际的磁盘、设备驱动程序和任何可能配置的阵列。

Even your physical volumes themselves are part of the logical layer, as the physical layer only encompasses the actual disks, device drivers, and any arrays that you might have already configured.

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