> Two completely different approaches to get a stable view of a file system: Ah, thanks. Is this just by accident or is there a technical reason for using one approach in one case and the other one in the other?
> - Internal (or -X) creates a copy of the file system You mean, a copy of the fs metadata? Or does it really copy the fs? > - External (or -x) just saves original data to the backup before it gets > overwritten. This snapshot is just a frozen image in time containing > unreferenced but open files. What's the reason for not performing the equivalent of an unmount in this case?
