I am currently using the /Z flag in a Windows Robocopy command with the intention of creating a "restartable" copy job. However, when the copy command is re-executed after an interruption, the copy job restarts at the beginning. This is evidenced when the top destination file (which was already completely written before the job interruption) changes timestamp to 1/1/1980 at the job start. Since this is Robocopy's built-in mechanism to track its progress, the file is treated as an incomplete copy and then rewritten. This continues for all other files that have already been successfully written to destination.
So my question is how do I use the Robocopy command in a truly restartable mode?
Thank you in advance for your help on this matter.