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VMware Data Recovery 2.0 (Failed to create snapshot for WSUS, error -3960 ( cannot quiesce virtual machine)

Posted on 2012-04-12
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Last Modified: 2012-04-18
We have VMware Data Recovery 2.0 backing up about 40 virtual servers every night. And all of them work but three. The only way to get them to work is to shut them down and backup them up manually. We think there might be a service or something running causing it to fail.
The error is:
4/12/2012 10:31:48 AM: Failed to create snapshot for WSUS, error -3960 ( cannot quiesce virtual machine)
4/12/2012 10:31:51 AM: Task incomplete

Server1 Wsus server
MS Windows Server 2008 R2 (64Bit)

Server2 Microsoft file server
MS Windows Server 2008 R2 (64Bit)

Server3 MSSQL 2008 server
MS Windows Server 2008 (64Bit)
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Question by:CityInfoSys
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13 Comments
 
LVL 120
ID: 37838954
Un-install and Re-install VMware Tools (it make take as many as six times!)

1. Un-install VMware Tools.
2. Restart
3. Re-Install VMware Tools.
4. Restart
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Accepted Solution

by:
dainjah earned 100 total points
ID: 37855530
1) Do you have independent disks configured for these VMs?
If yes, you cannot take live snapshots from such VMs. The solution is either taking snapshots in powered off state or disabling independent disk mode.

2) Please refer to these KBs for troubleshooting quiesced snapshots problem:
http://kb.vmware.com/selfservice/search.do?cmd=displayKC&docType=kc&externalId=1028881&sliceId=1&docTypeID=DT_KB_1_1&dialogID=294356221&stateId=1%200%20296540321
http://kb.vmware.com/selfservice/search.do?cmd=displayKC&docType=kc&externalId=1031298&sliceId=1&docTypeID=DT_KB_1_1&dialogID=294356221&stateId=1%200%20296540321
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Author Comment

by:CityInfoSys
ID: 37855914
Hanccocka, I tried Un-installing and Re-installing VMware Tools around eight times with restarts still not working.
Dainjah, We aren't using independent disks on any of the failing VMs.
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Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 400 total points
ID: 37855945
can you confirm the following, Create a Snapshot for the VM, wait 60 seconds and delete the snapshot.

when creating the snapshot, Tick Quiecse the Virtual Machine,

do you get the same error?

is this error on ALL VMs?

what Os?

Services hooked into VSS can also cause this failure.
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Author Comment

by:CityInfoSys
ID: 37858331
The snapshot worked fine. All the error and OS info is on my first post.

I snapshot-ed this server.
Server1 Wsus server
MS Windows Server 2008 R2 (64Bit)
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LVL 120
ID: 37858343
okay, please confirm if this is how you setup the Snapshot?

Snapshot
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Author Comment

by:CityInfoSys
ID: 37858349
I checked both boxes.
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LVL 120
ID: 37858380
please complete as in the screen shot. This is the Snapshot which VMware Data Recovery Manager tries to complete before the backup via the API. It will gives us information as to whether there are issues with the VSS driver in the VM.
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Author Comment

by:CityInfoSys
ID: 37858604
Ok, following your screen shot the snap shot failed. I tried this on the same server as before.

The guest OS has reported an error during quiescing. The error code was: 5 The error message was: 'VssSyncStart' operation failed: IDispatch error #8449 (0x80042301)
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LVL 120
ID: 37858614
okay so this confirms VSS issue in the guest, any other errors at time of snapshot.
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LVL 120
ID: 37858629
have you tried the VMware KB workaround as stated in the links above?
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Author Comment

by:CityInfoSys
ID: 37861288
It's working now it ended up being the Add or modify the row disk.enableUUID with the value FALSE worked. Will this have any effect on the backup?
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LVL 120
ID: 37861398
this is a workaround. Should not affect backups.
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