“Tweaked”, “Lonely”, and “Extra” refer to RoboCopy “Classes” of files.
For each directory processed RoboCopy constructs a list of files matching the Include Filespecs, in both the source and destination directories. The program then cross-references these lists, seeing which files exist where, comparing file times and sizes where possible, and places each selected file in one of the following classes:
File Exists In Exists In Source/Dest Source/Dest Source/Dest Class Source Destination File Times File Sizes Attributes =========== =========== ================ =============== ============= ============ Lonely Yes No n/a n/a n/a Tweaked Yes Yes Equal Equal Different Same Yes Yes Equal Equal Equal Changed Yes Yes Equal Different n/a Newer Yes Yes Source > Dest n/a n/a Older Yes Yes Source < Dest n/a n/a Extra No Yes n/a n/a n/a Mismatched Yes (file) Yes (directory) n/a n/a n/a
y default, Lonely files (and directories) are always copied, unless /XL switch is used. Changed, Newer and Older files will be considered to be candidates for copying (subject to further filtering described below), Same files will be skipped (not copied), and Extra and Mismatched files (and directories) will simply be reported in the output log.
Normally, Tweaked files are neither identified nor copied – they are usually identified as Same files by default. Only when switch /IT is used will the distinction between Same and Tweaked files be made, and only then will Tweaked files be copied.
Use the following switches to override this default behaviour:
Switch Function ======== ===================== /XL eXclude Lonely files and directories. /IT Include Tweaked files. /IS Include Same files. /XC eXclude Changed files. /XN eXclude Newer files. /XO eXclude Older files. Use the following switch to suppress the reporting and processing of Extra files: /XX eXclude eXtra files