New: VCB file-level mount of Windows Server 2008 using NBD transport mode fails with an Disk library failed (NBD_ERR_GENERIC) error
When the disk.EnableUUID parameter in the virtual machine settings is set to True on a Windows Server 2008 virtual machine, the VCB file-level mount using NBD transport mode will either fail with a Disk library failed (NBD_ERR_GENERIC)error or might stop responding, and the vcbMounter command does not run.
Workaround: Set the disk.EnableUUID parameter in the virtual machine settings to False by performing the following steps:
a) Power off the Windows Server 2008 virtual machine through vSphere Client.
b) Click Settings > Options >General > Configuration Parameters.
There is another thread here http://communities.vmware.com/message/1627497 discussing the same issues. You may want to have a look...no solutions as of yet...but hopefully progress as there are a few VMware support tickets open on the issue...