Hyper-V Host displays error "Automatic Reapir Failed" and will not start after Power Outage

I have a single Dell PowerEdge configured as a Hyper-V host running Wink12 R2 Preview as a Native Boot VHD and hosting about a dozen VM's. We had a break in the power, just a lights on lights off, but it was enough to shut the machine down and trigger restart.
But the machine won't restart--instead it displays a message "Automatic repair Failed" and none of the Advanced repair options work to get the host back online.
Any assistance is greatly appreciated.
Michael J. Murphy

Hi MJMurphy,
Sorry for the delay , it seems likely a disk problem cause of unexpect interrupt .
Please boot the host from OS ISO and  try to copy the VMs' VHD files and any important data to a safe place (such as external USB)via command prompt mode  .
(perhaps you need to prepare raid driver if you have a raid controler  )
Using diskpart --> list volume to check the status of disk partion or you can contact the hardware vendor to check it .
Hope this helps
Best Regards
Elton Ji
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