If another hard diskdrive still does not work, then it can be narrowed down to the hard drive controller.
如果换一个硬盘驱动器仍然不起作用,那么就可以将范围缩小到硬盘驱动控制器。
2
In practice, buffering may occur at various other levels, such as on the hard disk itself, the controller, or the kernel diskdrive device driver, so ours may not make much of a difference.