Comment 121 for bug 1470250

While we're not completely certain this is the smoking gun, I've observed that in the logs being posted here that there are no freeze/thaw operations taking place when the issue occurs. The commits that @jrp identified, fix messaging between the VSS utility driver and the host; and will hopefully ensure expected freeze/thawing of the filesystem during backup.

In our internal testing with the latest Linux-next kernel (which contains these commits) we were unable to hit this issue using scripts from @jsalisbury.

We look forward to hearing back from the testing.