2012-11-15 02:27 PM
I am having the same problem with smvi and protection manager. Working with ESXi 5.0U1 and smvi v4.1. I see this with machines that run SQL or Web services.
I found an interesting artifact from this. If you go to the VM that is failing, and look at the device manager's hidden devices:
To work around this behavior and display devices when you click Show hidden devices:
You will see hidden disk drives, hidden storage volumes, and possibly hidden ShadowStorage devices.
If you clear all of these devices, you should get a good snapshot. But, in my test so far, they come right back and then the snapshot fails again.
My thought is that these extra devices represent the snapshot process creating shadows and that they aren't closing out properly and get left behind. Haven't gotten any further than that yet, but I am continuing to look and test.