Response Probe, a tool on the Windows NT Resource Kit 4.0 CD, lets you design a workload and test it on your system. When your workload includes file I/O, you can choose whether the files accessed use the cache or are unbuffered. In this way, you can measure the effect of the cache strategy on your application or test file operations directly. For more information, see "Response Probe" in Chapter 11, "Performance Monitoring Tools."