Documentation

Quick test for error analysis

To identify problematic virtual machines that do not meet Microsoft requirements for online backup of the Hyper-V host, you can run the following command on the Hyper-V host.

1. Start the command prompt as administrator and start the disk management with diskpart.
2. Enter the following command:
   diskshadow / L C:\vss-hyper-v-test.txt
3. Then enter the command:
   list writers
4. Close the command prompt with exit.
5. Open the file “vss-hyper-v-test.txt” saved on drive C: \ and search for the keywords “Offline” and “Saved”.

All listed virtual machines with either “Offline” or “Saved” status do not meet Microsoft requirements for online backup of Hyper-V hosts. These can be dealt with using the checklist in the next section.