Backing up a Windows Failover Cluster with Shared vhdx?

Hyper-V specific discussions

[MERGED] Veeam Replicas with Shared VHDXs

Veeam Logoby itsdandandan » Tue Mar 28, 2017 2:51 am

Hi All,

Does Veeam 9.5 support replication of VMs with shared vhdxs? I found some forums threads from like a year ago that say no as Hyper-V does not support taking checkpoints of these disks. Has anything changed since then? I believe these are now supported in Server 2016.

Regards,
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby v.Eremin » Tue Mar 28, 2017 10:35 am

Your post has been merged into existing discussion regarding the same matter. Kindly, check answers above.
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby adruet » Tue Apr 04, 2017 9:38 am

spgsit5upport wrote:@nmdange, say who? You because you tried it & it works or you because you read it somewhere?

Obviously it does NOT work as reported here


I can confirm it does not work.
We have a hyper-V cluster running Windows server 2016 running latest march CU.
On top of which we created a cluster with two VMs running Windows server 2016 with latest march CU with VHD Set (VHDS).

We are unable to backup them in a constistent manner. It is also impossible to take checkpoint from GUI or from CLI (we get an access denied):
[VmmsAsyncSnapshotTask::RunTask()@307] Caught class Vml::VmAccessDeniedException: Access is denied. (0x80070005)

We opened a case with MS Support who confirmed that during Snapshot creation it uses functions to verify it has full and privileged access to the .VHDS file. Those functions have a bug (or more it seeams that the namespaces exist in code but are not really implemented). Anyway, a fix is in progress and might be available in April (no official release date yet).
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby Mike Resseler » Wed Apr 05, 2017 5:43 am

Alex,

This is actually good news! (Well, besides the fact that this bug is existing for so long now...) But it would be great if that bug finally gets fixed and we can take those backups. If I remember correctly, we have implemented the necessary code to support VHD set but because of the bug it never worked. So I am now crossing my fingers and hope it makes the next update. Will they warn you when that fix will be released? (I would like to know ;-))

Thanks
Mike
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby adruet » Wed Apr 05, 2017 8:15 am 1 person likes this post

The MS support engineer told us we should be warned when the fix is available (our case number with MS is: 117030715417023). If it is the case, I'll keep you posted.
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby Mike Resseler » Thu Apr 06, 2017 5:55 am

Great!

Looking forward to the news! Many people on this forum will be happy to hear it also
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby RGijsen » Wed Apr 12, 2017 8:47 am

We also have a MS ticket for this, 117040415552767. In a 'vanilla' 2016 setup with the RTM media, creating snapshots of VM's with VHDS works fine. However, after installing the cumulative updates that fails, and hence Veeam fails. MS are aware of the issue and there are multiple tickets now about this where they promise a fix. To I keep my fingers crossed for a while :)
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby Mike Resseler » Wed Apr 12, 2017 9:26 am

Well, same question as for @Alex... If you have more information, there are many people (besides me ;-)) that would like to hear when the fix is out

Thanks
Mike
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby cotterj » Fri May 12, 2017 9:03 pm

Any update on this topic? I'm having the same issue trying to backup a guest cluster with Hyper-V 2016 using VHD sets and Veeam 9.5. Are there any known workarounds? What is the KB update that causes the issues?
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby jamie2497 » Thu May 18, 2017 9:27 am

Also need an update on this, we are unable to backup our file server cluster at the moment as it uses the new VHDS format!
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby Mike Resseler » Thu May 18, 2017 10:36 am

Unfortunately we still don't have news from Microsoft :-(
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby bjackson@agi.com » Tue May 30, 2017 4:10 pm

@jamie2497 As an alternative, you could use the new v10 features to backup a file share directly. It would at least work as a band-aid for now.
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby Mike Resseler » Wed May 31, 2017 6:34 am

Brad,

Unfortunately v10 is not out yet, we just announced it :-)
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby adruet » Thu Jun 01, 2017 6:33 am

Still no news from Microsoft on our side either :/
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Re: Backing up a Windows Failover Cluster with Shared vhdx?

Veeam Logoby jjacobs1 » Fri Jun 02, 2017 2:33 pm

Having the same issue. Any word on a workaround?
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