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Windows Server® 2008 Hyper-V™ Resource Kit by Janique Carbone Robert Larson and Microsoft Windows Virtualization Team

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Virtual Devices

Virtual devices can be of two types: emulation and synthetic. Device emulation allows the virtual machine to see virtualized physical hardware. That means that the device driver providing the emulation interacts in most cases the same way it would with the physical counterpart. So an emulated device can provide near or perfect compatibility with existing software. Selection of which device to emulate is typically driven by a common denominator across all the operating system versions that you want to support. Emulated devices require the parent partition to provide a "monitor" to intercept requests for direct hardware access and redirect them to the correct location. Synthetic virtual devices do not attempt to emulate physical ...

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