Q. Are virtual machine created with Virtual PC compatible with Virtual Server and vice versa?

A. Yes, virtual machines with either product are compatible, but when using Virtual Server and Virtual PC together, there are several points to consider:

?Sound cards: Virtual Server does not include an emulated sound card in its virtual machines, while Virtual PC does. If you will be using a virtual machine on both Virtual Server and Virtual PC, you should disable the emulated sound card in Virtual PC. This will prevent the sound card's Plug and Play capability from causing errors on the virtual machine that you created with Virtual Server.

?SCSI support: Virtual Server provides SCSI support while Virtual PC does not. If you create a virtual machine with virtual SCSI disks on Virtual Server, the SCSI disks will be ignored if you move the virtual machine to Virtual PC. This can lead to negative consequences in many situations, for example if the virtual machine page file is on the SCSI disk or if you are trying to use a SCSI disk as the startup disk. If you plan to regularly move virtual hard disks between machines created with Virtual PC and Virtual Server, we recommend that you attach the virtual hard disks only to a virtual IDE bus in Virtual Server.

?Saved States: Saved-state (.vsv) files between Virtual PC and Virtual Server are incompatible. When moving a virtual machine between products, be sure to completely shutdown the guest operating system.

?CD-ROM drives: Although Virtual Server allows for virtual machines with multiple CD-ROM drives, Virtual PC supports virtual machines with only one CD-ROM drive. If you are moving virtual machines between the two products, you should configure only a single CD-ROM drive on the virtual machine and attach it to secondary channel 0, which is the default setting.