Guest OS failing to boot on a Hyper-V guest.

pdrakos
pdrakos used Ask the Experts™
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I have a new HyperV 2016 host that I have installed a guest on. Guest has been working for a coupe of weeks. This morning, the host crashed and then could not reboot. Received the following error:

'Host' has encountered a fatal error.  The guest operating system reported that it failed with the following error codes: ErrorCode0: 0xEF, ErrorCode1: 0xFFFFD188A76E9280, ErrorCode2: 0x0, ErrorCode3: 0x0, ErrorCode4: 0x0.  If the problem persists, contact Product Support for the guest operating system.  (Virtual machine ID 0D34259E-2CCF-4BBA-8585-74FAB2D381C3

ANy ideas here? The new server is a DC and is causing issues being down. If I can't get a quick solution will need to move onto backup DC.
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Distinguished Expert 2018

Commented:
What do you see on the virtual console when you attempt to start the VM?

Author

Commented:
When I turn the machine on, it tries to boot of the VHD, then proceed to try a PXE boot. After that times out, get "No operating system was loaded. Press a key to retry the boot sequence.

It says that the SCSI disk had no UEFI-compatible file system.
Distinguished Expert 2018

Commented:
So this doesn't sound like a VM or Hyper-V issue.  Sounds like the OS on the guest got nuked somehow.  A restore is probably the fastest recovery method at this point, given that behavior.
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Top Expert 2013

Commented:
Any idea why the host crashed?  Bad disks ?

Author

Commented:
Don't think it was a bad disk. I'm not onsite, but no indications of issues. I can get into the location of the VHDX file and manipulate the file (snapshot, merge snapshot) with no error. The host didn't crash, just the guest.
Top Expert 2013

Commented:
sorry, assumed host when you said; "This morning, the host crashed and then could not reboot. "  :-)

Author

Commented:
Sorry, meant guest.
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
Was/is there an A/V client installed on the guest?

Author

Commented:
no, it was a brand new server, had only been up a week. Hadn't gone into production fully yet.
Commented:
Found this video, which seemed to do the trick: https://www.youtube.com/watch?v=6C0V7bneycU

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