-is encountered the update might fail at that point, leaving the
-destination tree in a partially updated state. In that case, rsync can
+is encountered the update might be discarded with no error (if the file
+appears to be up-to-date already) or the file-update may be attempted
+and then, if the file fails to verify, the update discarded with an
+error. This means that it should be safe to re-run a read-batch operation
+if the command got updated. If you wish to force the batched-update to
+always be attempted regardless of the file's size and date, use the -I
+option. If an error occurs, the destination tree will probably be in a
+partially updated state. In that case, rsync can