Guest to Host time synchronization.

[AntonyBarlow]

I am having some difficulties with the time sycronization of the guest os's in our vm environment (ESX3.0.2 and guests are W2K3). All our esx hosts ahve deen configured to sync their time from a ntp server as in the KB article "Installing and configuring NTP on vmware ESX server", and are correctly keeping time. All the guest's have windows time disabled and the time sync option enabled in vmware tools. However all quests seem to be running their clocks to fast (gaining several minutes in a day) and no synchronization is taking place.

Any help or pointers would be greatly appreciated.

Thanks

[sbeaver]

I came accross this when dealing with time sync between client and host that I justed wanted to share.

Please modify the boot.ini file to use the /usepmtimer switch. To do this, follow these steps:

1. Log on to the computer by using an account that has administrative credentials.

2. Click Start, click Run, type notepad c:\boot.ini, and then click OK.

3. In the boot.ini file, a line that starts with "default" is located in the "[d-12537]" section.

This line specifies the location of the default operating system. The line may appear as follows:

default=multi(0)disk(0)rdisk(0)partition(2)\WINDOWS

In the "[operating systems]" section, locate the line for the operating system that corresponds to the "default" line.

For example, if the computer is running Microsoft Windows Server 2003, Enterprise x64 Edition, the line should resemble the following:

multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Windows Server 2003 Enterprise

x64 Edition" /fastdetect /NoExecute=OptIn

4. At the end of the line, add a space, and then type /usepmtimer. The line should now resemble the following.

multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Windows Server 2003 Enterprise

x64 Edition" /fastdetect /NoExecute=OptIn /usepmtimer

5. Save the file, and then exit Notepad

6. Restart the computer.

[rDale]

Beaver,

Are you using the /usepmtimer on VM guests running on ESX 3.x if the hosts are AMDs ?

r

[sbeaver]

To be honest ended up switching to AD time

Steve Beaver

VMware Communities User Moderator

*Virtualization is a journey, not a project.*