I've been successfully using Acronis 9.0 for several weeks for creating daily tib images until, all of a sudden, I started encountering over a 100 of these Warning messages in the post-"completion" log: "Failed to determine corresponding partition....Backup operation will not snapshot that path." All the Warnings correspond to K:\ drive, which has not changed with respect to directory structure. The size of the "completed" tib images (i.e., the *.tib files) -- despite the Warnings -- looks similar to the size I have seen before all these warnings started cropping up (which was about two days ago). So I'm confused as to the why the Warning says "Backup operation will not snapshot that path" when something obviously was written (??) I *did* recently defrag that drive (K:\). But the drive letter (path) has not changed. This is an external USB 2.0 HDD. Another question: Why does Acronis say "Operation has succeeded" or "Completed successfully" when -- upon inspection of Log -- it clearly did not (based on the warnings noted above).