It does the initial copy without errors. In the second run I ant to copy only changed files, but robcopy incorrectly recognizes everythig as changed and does the whole job again. Between two Windows servers robocopy works as expected. Only modified files are transferred in the second run.

I have tried with the below option with full permission on source and destination and its works. I copied near by 6 TB of data without error. Can you try this below option instead of using other options?

Robocopy Gui Download Windows Server 2016

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Via robocopy /debug and some subsequent testing I came to realize it's something about permissions. When I do /COPY:DAT it's just fine, when I do /COPY:DATS (to include ACLs) it all goes wrong. I don't think the files are actually copied (it's too fast for that) but I guess Robocopy tries to fix ACLs or something - and fails, because they are of course identical. (The ACLs and SDDLs look the same on source and destination). Still it's much slower than when it dosn't really do anything.

Also having this exact issue. If I robocopy to Windows, each directory without changes it only displays the directory name and local file count. If I robocopy to the Netapp, it lists every file but does not say "Newer or New File" next to the unchanged files.

I ran a test with a 3GB ISO file which confirms suspicions that the files are not getting copied each subsequent time. The problem is that it doesn't seem like they're getting skipped either which is increasing the total time it takes to complete.

Clearly something changed in Robocopy. Which is easy to prove since the copy works just fine with older versions of it but not with more recent ones. Now the base-problem however might be on NetApp's side - who seem not to imitate an actual Windows Fileserver quite closely enough. Which again is easilsy proven - because the problem does not occur when copying between (or to) Windows fileservers. So maybe newer Robocopy version rely on a feature not present or broken in NetApp's CIFS implementation?

So here's what I did. I copied a simple folder with a few PDFs with Robocopy. I copied from a cDOT Filer to a 7mode filer here, but copying the same folder from a "real" Windows fileshare shows the exact same behavior.

I did an initial robocopy /MIR /COPYALL - which as expected creates a duplicate ot the folder and files. Every subsequent run of /MIR /COPYALL shows the problem we have - all files are marked as "Modified" although they are not. However as established, the files do not get copied.

See the difference? On the NetApp the "change" value for the file differs from the value on the Windows fileshare. The value does NOT change when I re-run robocopy by the way, on neither Windows nor NetApp.

So this is it them - when Robocopy copies a file to a Windows fileshare it actually successfully copies "changed" timestamp. But it is NOT able to do so on a NetApp fileshare where the value corresponds with the time when the file was actually copied. And since Robocopy is not able to properly fix this timestamp it "re-tries" to fix it every single time we run robocopy. So as I said earlier, this seems to me to be "on the NetApp side of things".

None of this helps us though. Because we all know that opening a case for this is futile, but NetApp's and Microsoft's L1 will blame the other company and send me away. Anyone got an "inside contact" who might be in a position to have a look at this?

That's a workaround, not a solution ... especially since 2008 is in heavy phase-out, not planning to have many of them left. I think the situation is quite clear and I think it's on NetApps side but still, I know that calling Global support about this is futile and I have not "inside contact" ...

I think people on this thread raised 3 different scenarios that can cause this. With a mixture of windows Cdot and 7-mode mentioned and each scenario resolved differently. We can try and look on your scenario if you add a bit more details and try the different workarounds suggested here.

@ChristianSmetwho reported ODX was the cause in his case (In Win to Cdot). Referred to "/NOOFFLOAD" robocopy switch (not tested) and ODX disable on vserver "set adv; vserver cifs options modify -vserver [name] -copy-offload-enabled false"

Built on Microsoft Windows Server, Amazon FSx for Windows File Server enables you to migrate your existing datasets fully into your Amazon FSx file systems. You can migrate the data for each file. You can also migrate all the relevant file metadata including attributes, timestamps, access control lists (ACLs), owner information, and auditing information. With this total migration support, Amazon FSx enables moving your Windows-based workloads and applications relying on these file datasets to the Amazon Web Services Cloud.

Use the following topics as a guide through the process for copying existing file data. As you perform this copy, you preserve all file metadata from your on-premises data centers or from your self-managed file servers on Amazon EC2.

Create a service account on your Active Directory with delegated permissions to join computers to the domain. For more information, see Delegate Privileges to Your Service Account in the AWS Directory Service Administration Guide.

* For file systems joined to an AWS Managed Microsoft AD, the Amazon FSx file system administrators group is AWS Delegated FSx Administrators. In your self-managed Microsoft AD, the Amazon FSx file system administrators group is Domain Admins or the custom group that you specified for administration when you created your file system.

Open Command Prompt and map the source file share on your existing file server (on-premises or in AWS) to a drive letter (for example, Y:) as follows. As part of this, you provide credentials for a member of your on-premises Active Directory's Domain Administrators group.

Choose Run as Administrator from the context menu. Open Command Prompt or Windows PowerShell as an administrator, and run the following Robocopy command to copy the files from the source share to the target share.

The ROBOCOPY command is a flexible file-transfer utility with multiple options to control the data transfer process. Because of this ROBOCOPY command process, all the files and directories from the source share are copied to the Amazon FSx target share. The copy preserves file and folder NTFS ACLs, attributes, timestamps, owner information, and auditing information.

If you are copying large files over a slow or unreliable connection, you can enable restartable mode by using the /zb option with the robocopy in place of the /b option. With restartable mode, if the transfer of a large file is interrupted, a subsequent Robocopy operation can pick up in the middle of the transfer instead of having to re-copy the entire file from the beginning. Enabling restartable mode can reduce the data transfer speed.

hmmm, did you know that robocopy can not copy symlinks from source to destination?

the only way to solve this issue is to use replication tools that can easily do this job and I recommend you AllWaySync or gs richcopy 360 , both can help you

Hi Andoria

I use this tool as a backup/copy tool to our servers and our cloud and as an answer to your question, yes it can copy to Azure blob and the other major cloud providers like OneDrive SharePoint Online, AWS S3, and Google Drive.

and FYI it has an option to control the bandwidth while uploading to Azure Storage which not found on the other similar tools, so your bandwidth will not be consumed.

happy to help

Regarding the /Z switch. Not only does it slow down the copy process, it can lead to unresponsive SQL Server. As it happens. There is a bug of some sort with this combination: robocopy with /Z switch inside SQL Agent Job on Windows Server 2003 x64 and SQL Server 2005 x64. When connection was lost between server and destination location, Windows started to aggressively trim SQL Server memory. Server started to page, and slowed down to the point of unusability. SQL Server was not configured with Lock Pages in Memory privilege.

This is late to the party, but for the permanent record, the experience with /Z switch is unlikely the source of the problem. Robocopy simply doesn't do unbuffered IO. In my experience on win2k3 you'll get that aggressive trim behavior from any kind of copy operation that does it buffered when the file is read into memory.

Only two options for win2k3 that I've found, use unbuffered IO utility (such as eseutil) to push the file from the SQL box to the destination box) or enable Lock Pages In Memory for the SQL process (that's a commonly suggested setting for x64 SQL on Win2k3 (but not win2k8)).

We use RoboCopy with an add-on utility called RoboCopyPlus (www.robocopyplus.com). It wraps around RoboCopy and not only analyzes the result, based on exit code, but also compresses the logfiles to see only exceptions, and then emails them off to us depending on the result, with the compressed logfiles attached.

There are too many things to take into consideration while working with robocopy and in this fast worl who has the time for all this. I just paid a few bucks for a commercial software and it handled all for me. I used GS Richcopy 360 which helped me through the whole process. Simple to use even for a non-IT guy who is not good in solving errors. Haha!

A few months back, I was migrating about 4 TB of databases from a datacenter in Atlanta to New Jersey. Across a 1 GigaBit / sec network connection, there were times when I'd see throughput of only 5 - 20 MB / sec using ROBOCOPY or Windows Explorer drag/drop. The drag/drop method actually seemed to be consistently faster than ROBOCOPY. 

If it were entirely up to me, I'd rather have backed up the databases to removable USB 3.0 drives transferred them via sneakernet/coach or maybe FedEx them to NJ. I'm not a networking or infrastructure guy, and this was probably a one-off event, but I invite anyone to educate me on a better method of doing this if you were in a similar situation. 152ee80cbc

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