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Joined: Jul 26, 2016 1:57 pm
Full Name: Norsak

Win 8.1 64bit Guest "Failed to Prepare guests for volume S."

Post by Norsak » Jul 26, 2016 2:35 pm


New to Veeam, so this is hopefully an easy beginner question.
One of my older Hyper-V hosts is a 2012 Server (not R2), it has a Windows 8.1 64bit VM which fails on backup with the following error:
Failed to create snapshot (Microsoft Software Shadow Copy provider 1.0) (mode: Crash consistent) Details: Failed to prepare guests for volume snapshot.

I tried to google the error and got articles about VSS:
The Volume Shadow Copy Service is unable to allocate disk space to create a shadow copy because the specified limit is too small.

Ok, so I google how to increase the VSS disk space, closest I can find is commandline:
vssadmin.exe Resize ShadowStorage /For=C: /On=C: /MaxSize=20%

That alone did not change anything
Anyone have some suggestions as what I should try to remedy the situation?

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Full Name: Alexander Fogelson

Re: Win 8.1 64bit Guest "Failed to Prepare guests for volume

Post by foggy » Jul 26, 2016 3:41 pm

Please contact technical support for a closer look at your setup. Meanwhile you can check Windows Event log for VSS related issues.

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Full Name: Rodion Fedin
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Re: Win 8.1 64bit Guest "Failed to Prepare guests for volume

Post by -=MACROS=- » Aug 18, 2016 1:20 pm

Hi @all,

Eventually it's enought ...


You can also set the size to unlimited, but be sure you'va to habe realy enought space on your drives you want to backup

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