Hello, I've got an Server 2008 R2 - installed on a RedHat KVM Server. The Realtime of the KVM works fine. But the virtualised Server 2K8R2 had a delay of up to 20 sec in 5 Minutes. Has anyone an experiance with such a scenario. Do I had to set anything in the KVM to keep the time syncronus between host and VM? I run a script the resync the time every 5 minutes, but this is not the best way to solve the problem :( Regards and Greetings Thomas EDIT: I allready tried bcdedit /set /UsePlatformClock on Is was completed sucessfully but after that the time was running more slowly.

Hi, virtualised servers have more issues with time skew than a physical. While technically not entirely correct, you can understand that time measurement, which relies on counting cycles, does not work if cpu cycles are dynamicly handed out to differnet guests. Windows can synchronize time with an external source using the windows time service. You shoudl configure this service to fetch time from your Redhat server (which will need an ntp server) or have both sync their time from a reliable timesource. By default, a domain integrated Windows computer will use the pdc emulator in your domain as his timesource. So for all domain joined computers, you should jsut make sure the pdc gets his time from a reliable source! http://technet.microsoft.com/en-us/library/cc773263(WS.10).aspx http://support.microsoft.com/kb/816042 MCP/MCSA/MCTS/MCITP

Thank you. It's a problem from the KVM Configuration. Thank you for your help. Regards Thomas

Hi, Thank you for your feedback.Technology changes life