I recently had a problem with corrupt file system (that's what I initially thought, but right now I think the disk is dying). Anyway, what I did was re-partition my 750 HDD and installed Mountain Lion in another volume. Then, I copied "~/Music/iTunes" AND "~/Library/Application Support/MobileSync" folders from the (supposedly) corrupt ML to the new ML, and the next time I attached my iDevices to the Mac, they synced back without a problem and I didn't lose a single item. Of course, I also had iCloud sync set up before hand (and now I learned that I can use both the iCloud and manual backup to my computer, which is extremely convenient).
It was a little off-topic, but I just thought sharing that little story with others might be beneficial. I searched a lot before doing that but couldn't reliably verify I can move my Synced data between multiple installations, so maybe others in the same situation find it useful.
It was a little off-topic, but I just thought sharing that little story with others might be beneficial. I searched a lot before doing that but couldn't reliably verify I can move my Synced data between multiple installations, so maybe others in the same situation find it useful.