With the new Defraggler 2.12 I am no longer able to do a full file defrag by typing
df c:\ /s
into the command line.
This has worked several years before. I would use this to defrag an entire drive without having Defraggler move files around, basically making all files contiguous only and disregarding freespace..
I found this more effective than the Quick Defrag which skips files that have fragments larger than 50MB.
however the /s is only for subfolders so if you aren't defraggler a folder (i.e DF.exe "C:\program files\" /S the switch is redundant (doing this does work in 2.12)
df.exe c: should do the exact same thing, I don't think it's running a quickdefrag as there is a command switch for quickdefrag