- Multiple volumes are supported, and tracked separately.
- USN support is only available for NTFS, and the case is handled accordingly for that filesystem (currently not case sensitive).
- The actual behavior if USN isn’t available for one of the volumes (file system not NTFS, platform Linux, …) depends on the value of
-usn-policy:- off = USN not used
- auto = Tries to use USN, silently (info message) use full scan for any volume where USN cannot be used
- on = Tries to use USN, use full scan for any volume where USN cannot be used, and issue warning.
- required = Tries to use USN, abort backup with error if it fails for any of the volumes.
2 Likes