"The decision to invest in the USB 3.0 was easy to do, but do so without compromising the existing ecosystem USB was a big challenge to overcome," Flanagan said in a blog. "Our design had to follow the specification revision 3.0, precisely to allow new USB 3.0 hardware. There are billions of old USB devices must be compatible with Windows."
To USB 3. 0 working with the next generation of Windows, Flanagan says Microsoft began working with hardware manufacturers soon to "meticulous design of a new USB software stack for the new driver, maintaining existing interfaces and behaviors, ensuring all devices and the controller work. " To do this, which refined a model checking tool called Zing software to test every aspect of your software model.
Other studies to prepare for USB 3.0 includes a large number of hardware testing and creating a custom tool called Mutt (USB testing tool) "to simulate a full range of device operation that we had observed in recent years." In essence, it allowed Microsoft to test 1,000 different USB devices with a single USB flash drive.