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Troubleshooting Virtual Machine Issues

Updated: March 5, 2009

Applies To: Virtual Machine Manager 2008, Virtual Machine Manager 2008 R2, Virtual Machine Manager 2008 R2 SP1

The topics in this section provide guidance for troubleshooting issues with virtual machines when you are using Virtual Machine Manager (VMM).

Also in this section:

Troubleshooting Virtual Machine Conversion Issues

When you try to use SAN to migrate a virtual machine, only the network option is available, and the “SAN Explanation” indicates that there is more than one virtual machine on the same LUN.

Possible causes

In non-clustered cases, LUNs are migrated through masking that prevents simultaneous access to the same LUN by multiple hosts.


Deploy or create only one virtual machine per LUN.