Why Microsoft Hyper-V VSS Writer fails with en event ID10103

[tobia]

Hi everybody,
I would like to know what can causes a Windows event ID10103 during the snapshot, this is the error message:

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Failed to revert to VSS snapshot on the virtual hard disk '\\?\Volume{29e16157-002f-4cb4-af58-c95acbd54be9}\' of the virtual machine 'srvshare1'.

I got this error only in a particular VM, but I have to say that this VM has the biggest harddisk (650GB) of my cluster.
I tryed to reboot its node and also this VM, sometimes after that reboot the snapshot works again for one time, but after that it fails again.

[PTide]

Hi,

Please specify what is your host OS and guest OS. Are there any other error messages in windows log? Also, what's the output of 'vssadmin list writers'?

Thank you.

[tobia]

Win server 2012 in both host and guest.
The command ''vssadmin list writers' lists an error only in the writer: 'Microsoft Hyper-V VSS Writer'
State is Failure and Laste error is Recoverable Errore.


Thanks

[PTide]

Is it 2012R2? If so, then do you have a SCSI controller attached to problematic VM?

[tobia]

It is a Win2012 simple, not R2.
The VM doesn't have any scsi connected, its hdd (vhdx) are store in a shared SAS storage.

[PTide]

Then a deep-dive into logs might be required - please open a case with support and post case ID in this thread.

Thank you.

[tobia]

Disabling the "Application-Aware Image Processing" for this particular VM, the backup job works...
I will consider to open a case. Thanks

[PTide]

Hi,

Any news from support? Btw, could you please post the case ID?

Thank you.

[tobia]

My support contract has expired, so firstly I'm trying to solve using the community help.

[PTide]

How much of free space do you have on the storage that hosts your 650Gb disk?

[tobia]

269GB of free disk...

[PTide]

What kind of application do you run on that server? How intense is the datachange rate?