Stephen, On Wednesday 11 August 2010, Stephen Liu wrote: > The clock of VMs is controlled by that of the host. On testing a VM > relating to clock it must change the clock of the host. In such > arrangement the clocks of other VMs are influenced. Please advise how to > disconnect the link between the clocks of a VM and the host? TIA
that is not entirely correct. The guest clock is synchronized with the host clock but not the other way around -- the guest is NOT able to change the clock of the host. The synchronization of the guest clock is done by two means: 1. The virtual RTC of the guest is set ONCE during the VM startup to match the time of the host. Every second the virtual RTC is advanced by one second, so both clocks, the virtual RTC of the guest and the clock of the host are synchron. 2. Under certain circumstances, the guest clock can drift away from the host clock. Therefore the guest additions have a mechanism to slowly synchronize the guest clock with the host clock. If you want to set the guest clock to a time different from the host, you must disable the time synchronization of the guest additions (the easiest way is to uninstall the guest additions). Then you can change the guest time. This change will not have any impact on the host. Each guest has its own virtual time. Kind regards, Frank -- ORACLE Deutschland B.V. & Co. KG Dr.-Ing. Frank Mehnert Werkstrasse 24 Staff Engineer, VirtualBox 71384 Weinstadt, Germany mailto:[email protected] Hauptverwaltung: Riesstr. 25, D-80992 München Registergericht: Amtsgericht München, HRA 95603 Komplementärin: ORACLE Deutschland Verwaltung B.V. Rijnzathe 6, 3454PV De Meern, Niederlande Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697 Geschäftsführer: Jürgen Kunz, Marcel van de Molen, Alexander van der Ven ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ VBox-users-community mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/vbox-users-community
