topic SMHV jobs fail after live migration of Guests in Microsoft Virtualization Discussions

SMHV jobs fail after live migration of Guests

rdenyer001 — Thu, 05 Jun 2025 07:09:55 GMT

We have been doing some testing with our 4 node Windows 2008 R2 Hyper-V cluster and SnapManager for Hyper-V.

We have some test Windows 2003 and Windows 2008 guests some with and some with out pass though LUNS.

Last week we had finally applied all the relivant hot fixes as per NetApp Hyper-V best practice and NetApp Technical support, and were able to get 100% sucessful jobs SMHV jobs of both types of guests with and without pass through LUNs.

To continue testing our IT manager did a live migration to move the guests around on the cluster, as you would if you were going to take some hosts off line for maintanence.

Our SMHV jobs started failing with the following VSS errors

Backup failed with VSS Retryable error.
(9)] Writer Microsoft Hyper-V VSS Writer involved in backup or restore encountered a retryable error. Writer returned failure code 0x800423f3. Writer state is 5.
For more information, look at the Hyper-V-VMMS event log in the Windows Event Viewer under "Applications and Services Logs->Microsoft->Windows".

Any ideas on what we have missed ?

We were expecteing that SMHV would not be affected by live migrations ??????

Regards,

Richard

Re: SMHV jobs fail after live migration of Guests

rdenyer001 — Tue, 31 Aug 2010 21:49:07 GMT

Further update

After a day of un-installing and checking all configuration options for SnapManaager for Hyper-V and SnapDrive we have found that its is only the VMs with pass through LUNs that fail.

Re: SMHV jobs fail after live migration of Guests

ophir — Tue, 09 Nov 2010 11:08:16 GMT

Hi ,

I have the same issues with live migration and the server doesnt have Pass through disks ,

I have lots of Virtual machine that failed .

Backup task failed to succeed. Error: Vss Requestor - Backup Components failed.Writer Microsoft Hyper-V VSS Writer involved in backup or restore encountered a retryable error. Writer returned failure code 0x800423f3. Writer state is 5.
For more information, look at the Hyper-V-VMMS event log in the Windows Event Viewer under "Applications and Services Logs->Microsoft->Windows".

Any Idea ?

Thanks

BTW do you have the all list of the Hotfixes that install ?

Ophir

Re: SMHV jobs fail after live migration of Guests

rdenyer001 — Wed, 10 Nov 2010 22:24:08 GMT

Hi,

Needed to make sure that Hotfixes were installed

In particular we needed to take this in to account as a lot of our guests VMs had pass through LUNs

Virtual machine backups taking too long to complete

If a virtual machine contains several direct-attached iSCSI LUNs or pass-through LUNs, and SnapDrive

for Windows is installed on the virtual machine, the virtual machine backup can take a long time.

The Hyper-V writer takes a hardware snapshot of all the LUNs in the virtual machine using the SnapDrive

for Windows VSS hardware provider. There is a Microsoft hot fix that uses the default system provider

(software provider) in the virtual machine to make the snapshot. As a result, the Data ONTAP VSS

hardware provider is not used for snapshot creation inside the child OS and the backup speed increases.

For more information on the Microsoft hot

fix, see Knowledge Base article 975354 on the Microsoft

support site.

Related information

Knowledge Base article 975354 - http://support.microsoft.com/

This is from the SMHV release notes

Regards,

Richard

Re: SMHV jobs fail after live migration of Guests

christoph — Mon, 12 Dec 2011 10:43:20 GMT

Hi Richard,

We've the same issue with a customer running SMHV on a Win2008R2 SP1 machine. SP1 does contain the KB Artikel 975354 Hotfix and the VSSAPI.DLL has a higher version number than in the article.

You know anything about the issue with the hotfix installed? We've a SQL Server running with iSCSI Guest connections. Is the registry hack with setting VSSRequestor necessary to get such a situation running?

BG Christoph