我如何才能找到硬盘速度 [英] How can I find hard disk speed

问题描述

我如何才能找到硬盘速度？我不能使用 System.IO.File.Copy 并使用定时器来获得硬盘的速度，因为缓存文件之后，速度会比真正的实时高。

How can I find hard disk speed? I can not use System.IO.File.Copy and use timer to get hard disk speed, because after caching file, the speed will be really higher than real time.

我能做些什么呢？

推荐答案

究其原因，后续的读取速度是高得多的写入文件后比预期的是，该文件是通过在当它在存储器即写入的磁盘系统缓存操作系统缓存。后续文件的读取是有效从内存中读取，而不是磁盘。

The reason the subsequent read speed is much higher than expected after writing a file, is that the file is cached by the OS in the disk system cache when it is written i.e. in-memory. The subsequent file read is in effect being read from memory, rather than disk.

请查看此代码项目的文章提供了一个解决方案，通过利用绕过操作系统磁盘缓存 FILE_FLAG_NO_BUFFERING 标志：

Please see this code project article which provides a solution for bypassing the OS disk cache by leveraging the FILE_FLAG_NO_BUFFERING flag:

http://www.codeproject.com/KB/files /unbuffered.aspx

这解决方案可以在你的环境中使用，以避免操作系统磁盘高速缓存，所以得到真实的磁盘速度。

This solution can be used in your context to avoid OS disk caching, and so obtain "real" disk speeds.

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