Apparently there is no way to make RoboCopy ignore file timestamps. Yes, there are ways to tweak the invocation to ignore two-second time differences and all that. But, come on, rsync has the “-I” switch:
Rsync has: -I, --ignore-times Normally rsync will skip any files that are already the same size and have the same modification timestamp. This option turns off this "quick check" behavior, causing all files to be updated.
Besides, is the file timestamp really part of the file? Nope, so tools should have the option of using it or not. Sure not using timestamps may make certain things take longer, but if data is really important, you’ll want to examine each byte of a file to see if you really have the “latest”.
What instigated the above rant: Dealing with deployment from CVS repo.