![]() ![]() This is expected because generation 2 does not support all of the Hyper-V-supported guest operating systems. Can I run generation 1 and generation 2 virtual machines together? The following are some frequently asked questions regarding generation 2 virtual machines. Also reduces the attack surface from the guest operating system. Uses fewer resources because there is no emulation. Universal asynchronous receiver/transmitter (UART) for COM ports Support for up to 64 SCSI DVD devices per SCSI controller. ![]() vhdx (64 TB maximum size, and online resize capability) Device support comparisonįollowing is a device comparison between generation 1 and generation 2 virtual machines. This can be modified after you create the virtual machine. Secure Boot is enabled by default for generation 2 virtual machines. Secure Boot is a feature that helps prevent unauthorized firmware, operating systems, or UEFI drivers (also known as option ROMs) from running at boot time. The virtual Integrated Device Electronics (IDE) controller is not available in generation 2 virtual machines. Generation 2 virtual machines can boot from a virtual hard disk or DVD that is attached to the SCSI controller. In previous versions of Hyper-V, you could not boot a virtual machine from a SCSI-attached virtual hard disk or from a DVD. Generation 2 virtual machines support PXE boot by using a standard network adapter. Legacy network adapters are not available in generation 2 virtual machines. In previous versions of Hyper-V, if you wanted to perform a remote installation of the guest operating system by using PXE boot, you were required to install a legacy network adapter. Generation 2 virtual machine features PXE boot by using a standard network adapter PXE boot by using a standard network adapterĪfter a virtual machine is created, you cannot change its generation. Generation 2 Provides the following new functionality on a virtual machine: Generation 1 Provides the same virtual hardware to the virtual machine as in previous versions of Hyper-V. In Windows Server 2012 R2 there are two generations of virtual machines to choose from when you create a new virtual machine: In previous versions of Hyper-V, there was only one generation of virtual machine. For Hyper-V on Windows Server 2016 Technical Preview or Windows 10, see Should I create a generation 1 or 2 virtual machine in Hyper-V? This topic describes the various benefits and the requirements for generation 2 virtual machines. ![]() The majority of legacy devices have also been removed from generation 2 virtual machines. Generation 2 virtual machines have a simplified virtual hardware model, and supports Unified Extensible Firmware Interface (UEFI) firmware instead of BIOS-based firmware. In Hyper-V there are two supported virtual machine generations, generation 1 and generation 2. The generation of a virtual machine determines the virtual hardware and functionality that is presented to the virtual machine. ![]()
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