Tuesday, October 7, 2014

Resuming a failed VSS Upgrade

I was performing a VSS Upgrade to TFS recently and after many hours of running, the VSS Upgrade seemed to freeze and not continue processing.  As you can probably guess, canceling the operation had no effect, thus requiring me to kill the actual VSS process.

I wasn't sure about the state of the migration at that point, but I decided to re-launch the VSS Upgrade wizard just to see what options were available.

Below is the dialog that I saw:

Upon re-launching the VSS Upgrade Wizard, I was presented with the option to resume a previous upgrade!  Therefore, all of the hours spent on performing the analysis and migration could potentially be saved!

Of course, you will have to determine whether or not this option is viable for you.  If you are migrating a recent VSS 2005 database that returned with a clean analysis, a resume may work out just fine.  However, if you are working with an older VSS 6.0 database that might be on its last legs due to the numerous errors in the database, it is probably safer to simply start the upgrade all over again.

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