• Event ID 12293 Error calling a routine on a Shadow Copy Provider

    I struggled for a while on this one so I figured I’d post my findings here.  I have been trying to use the VMware vCenter Converter Standalone to convert a physical Windows 2003 server to a virtual machine.  Every time I would try, I would get a “Unable to create a VSS Snapshot of the source volume(s).  Error code: 2147754774.

    The event logs on the server were showing an Event ID: 12293 with the message “Volume Shadow Copy Service error: Error calling a routine on a Shadow Copy Provider error in the event log.

    I tried everything I could find to get VSS working.  I installed the recommended hotfixes, defragged the drive, checked the running services and so on.  I finally found an article that talked about disk volume signatures and disk imaging.  Come to find out, the drives in this server are in a RAID and they were replaced.  The system was imaged first and then imaged back onto the new RAID.  This causes a problem with the disk volume signature and VSS.

    To fix the issue, I downloaded MbrFix from http://www.sysint.no/mbrfix and extracted it into C:\TEMP and ran it and changed the disk signature by one number, rebooted the system and VSS started working again.


    As you can see from the screenshot, I used the following command to get the current disk signature

    MbrFix /drive 0 readsignature

    Then I change the signature by changing one number using for following

    MbrFix / drive – writesignature XXXXXXXX (where XXXXXXX is your new signature)

    After a reboot, the system came right back up and VSS is working fine.

    I reran the conversion to convert the physical server to a virtual machine and it ran without any errors.

    I hope this helps save someone hours of searching!

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