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How to diagnose a client backup failure with Windows Home Server

June 8, 2010 by Wayne Small 2 Comments

Recently my Win7 x64 desktop machine started to fail it’s backups to the Windows Home Server I have.  I attempted to do manual backups but it just hung at 0% complete as per the screen shot below.

image

To diagnose the problem, I looked at the client side log files which are located at C:\Users\All Users\Microsoft\Windows Home Server\logs on the computer.

In particular I looked at the BackupEngine log file (it’s name is a fair bit longer and is based on the date/time that the last backup was done).  You can see my log file below.  It appears to be failing at the VSS Snapshot attempts.

image

Ok – Run a CMD prompt now and then the use the VSSADMIN LIST WRITERS command to show the current state of the VSS writers on this computer.  It gives the output below.  You can see that a couple of the writers are in the “State: [5] Waiting for completion”.

image

Ok – now into the event logs on the server and I can see that it looks like we have a few critical errors in the VSS including the one below.

image

We’re on the right track now.  I ran a script to re-register the VSS writers and rebooted and as you can see all the VSS writers have returned to normal.

image

I then ran the VSSADMIN LIST PROVIDERS command to list the providers of VSS services on this machine.  It showed TWO VSS Providers, one being the standard Microsoft Software Shadow Copy Provider v1.0 and the other belonging to a third party imaging product that I was beta testing but had since removed.  Given I’d removed the imaging product, the provider should not have been there, so I traced back in the registry to find that it’s registry key still existed under HKLM\SYSTEM\CurrentControSet\CSS\Providers.  I was able to delete the offending registry key for the VSS Provider, reboot and run backups.  Backups have been running just fine now for the past month without issues.

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Filed Under: FAQs Tagged With: Troubleshooting, Windows Home Server

About The Author

Wayne has been working with Microsoft Server products in the SMB market for over 20 years. He has a passion for technology and been a Microsoft MVP for over 15 years. Read More…

Comments

  1. Mike says

    June 9, 2010 at 10:45 pm

    Do you have the script that re-registers all of the VSS writers?

    Reply
    • Wayne Small says

      June 9, 2010 at 11:33 pm

      I do Mike, I’ll post it in the next 24 hours

      Reply

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