----- Original Message ---- From: Frank Mehnert <[email protected]> To: Community mailing list of VirtualBox users <[email protected]> Sent: Wed, August 11, 2010 2:37:53 PM Subject: Re: [VBox-users] About the clock
- snip - >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. Hi Frank, Thanks for your advice. I need VboxGuestAddition for sound and "copy & paste" btw vm and hose. Problem solved as follows; Change to past date:- VBoxManage modifyvm <name of VDI> --biossystemtimeoffset -<msec> msec = number of days (backward/forward) x 60 x 60 x 1000 To reset to present date (today) VBoxManage modifyvm <name of VDI> --biossystemtimeoffset 0 B.R. Stephen L -- 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 ------------------------------------------------------------------------------ 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
