![]() That said, it is still a user-mode file-level utility running at the very top of the stack. It’s a great tool for IT professionals who want real control over moving files. Unlike the graphical File Explorer, it hasįor multithreading, security, large files, retry, logging, and more. Robocopy has been around for decades and is certainly the most advanced file copy utility shipped in Windows. Oh, and you may accidentally learn about Perfmon data collector sets. Today I compare Storage Replica’s performance with Robocopy and demonstrate using SR for more than just disaster planning peace of mind. In Windows Server 2016 for synchronous, zero data-loss protection, it also offers a tantalizing option: ![]() It's mainly for problematic connections or very large file copies that might get interrupted.First published on TECHNET on Jul 09, 2015 If your network connection is robust enough, you won't need to use /z. Unless you have lots of very, very large files or files that will change daily, the restartable mode is unnecessary. You can run robocopy /z and half way thru copying a file, ctrl-c cancel, restart the computer, then run the command again and it'll continue from where it left off. An incomplete file has the same file size as the complete file, and is noted with a date stamp in the file system being within 24 hours of 00:00.īasically, /Z adds lots of overhead adding markers to the file it's writing to to track the copy process in case the network connection drops or the power goes out in the middle of copying a 100TB file and you don't want to start over from the beginning.Į.g. This is useful for reliably copying large files or many files over an unreliable network such as a VPN or the Internet. "Restartable" means Robocopy should write a recovery record inside an incomplete file so if the operation is interrupted or aborted, a future run of Robocopy can resume copying where the previous one left off, instead of starting over at the beginning. So, this thread is 5 months old, but if it helps you or others in the future, the issue is the "/Z", aka "Restartable Mode" ![]()
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