Mar 3, 2023 · What really made the copy-process slow: /z-option (restartable copy process). Where /s means subdirectories, and /z means in restartable mode. 2. Adjust these options according to your needs. So if you use /Z on a transfer over a network it Apr 27, 2021 · Let’s look at a more practical example that will accomplish this. /S: Copy Subfolders /E: And empty ones too /XO: Only copy things that have changed on the source /B: Usebackup mode if you dont May 28, 2024 · In restartable mode, should a file copy be interrupted, robocopy can pick up where it left off rather than recopying the entire file. Both using gigabit network. This allows you to copy files you might otherwise not have access to, assuming it’s being run under an account with sufficient privileges. But I don't know how to determine Robocopy's default priority, so as to choose a slightly slower priority. I copied from hard drive to hard drive (SATA to external USB 3. If you use the guide above you should now be able to see that this job will run in restartable mode, it will copy all empty directories, retry zero times and wait zero seconds, it will Jan 27, 2005 · Robocopy in action Commonly Used Options. Jan 4, 2022 at 14:18. /Z — Copy files in restartable mode. Jul 15, 2020 · To include only the newest text files, we can run the Robocopy command like below. Oct 23, 2013 · Brilliant mate, thanks!! :) However, I still have the issue of the parent folder not being included, that's the only thing now bugging me. or do I need to ad another Nov 8, 2013 · ROBOCOPY is a powerful tool to make the copying or moving very easy and efficient on Windows operating system. Search for Command Prompt, right-click the top result, and select the Run as administrator option. Hello I built a truenas machine a couple Jan 4, 2022 · If your machine is going to sleep that means the copying is being suspended. /sl : Copy symbolic links instead of the target. 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. – HugoRune. /MT. /j: Copies using Jul 25, 2014 · 1. I just did a test run without the /z-option, and the copyspeed was increased by factor 6. /b. Drag and drop the files between servers using explorer yields around 110MB/s, which is the 5. Copies files in backup mode. It's $30, but there is a free version with less features available. 5hours though. /R:3: Specifies the number of retries on failed copies. Robocopy reads files from the source system in backup mode (/B). I used to use this method when migrating data from one server to another. The /Z (restartable mode) is important for copies over the network, in case of network disruptions (caused by bad cards, drivers, or by actual network issues) because it will allow the copy to pick up where it left off. Uses 256-color mode. txt /XO. /R:n: Specifies the number of retries on failed copies. Only files that have been modified. /E – Copies all subdirectories including empty ones. NOTE: I’ve found that using robocopy to copy across a network doesn’t always work using mapped drives! Instead, use the full path (especially important when running as a Task in Windows Task Manager). Keep in mind that more threads will need more CPU and Mar 5, 2023 · Robocopy very slow, even if I do not copy anything and just create a list (/L) I want to create a backup with the "robocopy" command. Oct 7, 2023 · /ZB: Uses restartable mode for backup. -- Nov 12, 2023 · In that mode, robocopy pauses whenever file copying would cause the destination volume's free space to go below a 'floor' value, which can be explicitly specified by the LFSM:n[KMG] form of the flag. If file integrity is very important, then why not do both? Create md5 hash before uploading, robocopy them over (or xcopy), and then check the md5 hash after it arrives. What is robocopy copy files in restartable mode? Copies files in restartable mode. 1. The first of these options is something called Restartable Mode. This is on windows server 2016. Copies only files that have the archive attribute set. /j Mar 19, 2010 · Make a standard script to add mapping for every computer in your network. Jun 11, 2015 · /MOVE : Move files and dirs (delete from source after copying). log) the + adds to the file. The /S command copies subdirectories, but not empty ones. *" /f /s /q. If you want to keep only the parent directory, you must remove the empty subdirectories manually, or use one of the other answers that work. /IPG:n : Inter-Packet Gap (ms), to free bandwidth on slow lines. /W:n : Wait time between retries – default is 30 seconds. For example, the following command will copy all files and directories from C:\Source to D:\Destination using 16 threads: robocopy C:\Source D:\Destination /S /MT:16. If you have a low power PC (my PC uses 15 watts), set to never sleep when connected by AC and then set the monitor to turn the display off after 15 minutes. log (Note: if NOT running as admin you need to put this in your user folder C:\Users\username\robocopy. Copy all DirectoryA contents to DirectoryB with file attributes and empty directories: C:> Robocopy C:\DirectoryA C:\DirectoryB /E. exit. mkdir F:\TempRemoval. /b: Copies files in backup To sync files from your source directory to your destination directory, use the following command: robocopy C:\src C:\dst /MIR. And using xcopy is alright too. You can see below the command only copied the two files that had “file” in the name, everything else was skipped. In restartable mode, should a file copy be interrupted, robocopy can pick up where it left off rather than recopying the entire file. /Z – Copies files in restartable mode (that is, restarts the copy process from the point of failure). /TEE - If using LOG and you also want console output, put the /TEE option in. /E — Copy Subdirectories, including empty ones. /mov /e will move files but copy subdirectories. exe is 4 for all 3 of them. nl In restartable mode, should a file copy be interrupted, robocopy can pick up where it left off rather than recopying the entire file. 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 Feb 13, 2015 · Newer versions even have options for entering delay, to prevent from saturating WAN links. Buffered I/O augments the simple copy to optimize for future reads of (and writes to) the same file by copying the file into the filesystem cache, which is a region of virtual memory. This was tested on a Windows 7 machine. I will also look into the gui. Jan 6, 2020 · In the case of slow USB2 copy, Multi-Threaded is not recommended. Dec 31, 2020 · I see the possibility of using START to specify process priority. Dec 24, 2013 · /Z : Copy files in restartable mode (survive network glitch). 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. /B : Copy files in Backup mode. /xj Excludes junction points, which are normally included by default. I found it: /Z only works if you transfer data from a network device. This test had the biggest impact on the duration with more threads. I know a solution that Jun 14, 2022 · How reliable is robocopy using restartable mode- how likely are files to become corrupted? What would be the best way to incorporate into the script a check to see whether a file has corrupted during the copying process? Here is a sample of my code: robocopy /s /z /ndl /r:0 /w:0 /mt:32 . JSON, CSV, XML, etc. Use Restartable mode /Z to process partially-copied files. Second, for repeatable jobs, I love SyncBackSE. name in the top-level source and destination directories of the copy session. Step 4: Click the Share button. Jan 7, 2017 · Windows Robocopy Command with Examples To Copy Files In Safe Way. Restoring Files Using Robocopy # When the need arises to restore files from your backup, Robocopy can again come to Mar 16, 2016 · robocopy /Z /E /R:0 /W:0 "source" "destination" /XD "Temp" "Temporary Internet Files" /XJ [quotes on temp folders are required, but not source/destination]. It allows you to copy files from which you might otherwise receive an access denied error, either on the file itself or when attempting to copy the file’s attributes and Jun 22, 2023 · Below is a description of the Robocopy options: /E — Copy Subdirectories, including empty ones. Examples: Example 1: A simple Robocopy command looks like this: This command will copy all files in C:\Folder1 to C:\Backup. It does not do an optimized move. Restartable Mode can be enabled using the /Z switch, and is well suited to situations in which you need to copy large files over a potentially unreliable network. But after that the durations dropped very fast: 4 threads saved you more than 14 minutes and 128 threads take another 100 seconds less! Robocopy multithreading – text files. Mirror DirectoryA with network Server in local network in resume mode if network connection is lost (/Z) Apr 8, 2022 · Robocopy to perform the copy, so something like: robocopy D:\Source \\\SERVER\share /MIR /R:5 /W:5 /Z /MIR will mirror the data /R:5 is retry 5 times /W:5 is wait 5 seconds between retry /Z is restartable mode. In the above example, the robocopy command would copy all files (not directories) in the hope directory to the hope2 directory. Step 1: On Windows 10, open File Explorer. Some file Oct 3, 2020 · I'm attempting to use the /MT switch in Robocopy and it doesn't appear to be working. I am currently using the /Z flag in a Windows Robocopy command with the intention of creating a "restartable" copy job. Unless you have lots of very, very large files or files that will change daily, the restartable mode is unnecessary. Aug 29, 2019 · robocopy g:/my_data_folder h:/my_data_folder /e /np /fft /mt:8 /z /r:5 /w:5 where: /e = copy even empty directories /np = no file copy progress - don't need it /fft = in case of any date/time errors due to network drive /mt:8 = use 8 concurrent threads to speed things up /z = restartable mode so it can recover from an interrupted transfer Apr 15, 2021 · The Robocopy docs lists options that control Robocopy's behavior regarding file system links: /sl Don't follow symbolic links and instead create a copy of the link. With this option, when the copy is interrupted so some particular file is partially copied, the next execution of robocopy can pick up where it left off rather than re-copying the entire file. /E: Copies subdirectories, including empty ones. (defaults to copying *. 3. either is specified, robocopy will skip any files or directories with that. /ZB : Use restartable mode; if access denied use Backup mode. The /E switch instructs Robocopy examples to copy all subfolders, even empty ones. If file access is denied, switches to backup mode. 1 show, it doesn't Sep 1, 2020 · /zb – Use restartable mode, and upon access denial, attempt to use the backup mode (shadow mode) /MT:nn – Copy files using multiple threads, which you would define by replacing the nn placeholder with the number of threads. Robocopy has a lot of features that we can use to copy data faster, Below we’re using the most common options to make copy reliable and fast. Dest /copyall OR Copy:DATSO: I would go DATSO you wont need the auditing info, but if you do COPYALL is better fit then mirroring. /EFSRAW :: copy all encrypted files in EFS RAW mode. /B :: copy files in Backup mode. Data source is outside AWS cloud (However, transfer tests from an EC2 instance in same subnet was below par) No Direct Connect but Apr 23, 2019 · Fortunately, Robocopy provides some tools for avoiding these frustrating situations. If file access is denied Mar 29, 2016 · robocopy source dest /copy:DATSO /S /E /XO /B /Z /R:1 /W:0 /V /TEE Log File. robocopy "source" "destination" /E /DCOPY:DAT /COPY:DAT /R:5 /W:10. Dec 26, 2023 · The /x option tells Robocopy to copy files that are newer or have a different modification time, size, or checksum than the destination file. Basic File Copying. To use Robocopy multithread, you need to add the /MT command to your Robocopy command line. robocopy "F:\Example" "F:\TempRemoval" /move /e /minage:1. *) Destination_folder The basic format is: robocopy <source path> <destination path> <switches>. Try running robocopy with the /Z switch, which is defined as: /Z : Copy files in restartable mode (survive network glitch). Notice that the switch /S was added automatically. rmdir F:\TempRemoval /s /q. Paladin, yeah, I agree, I'm having problem writing data to disk, but as tests B. I could use some guidance on improving data transfer speeds while using Robocopy to copy data into an FSx filesystem. /b: Copies files in backup mode. If you were to look at the directory, in this case, we have three picture files. 2: Copy "Standard_login. Drawback it it'll copy super slowly. A partially copied file is used in restartable mode (/Z). /B :: copy files in robocopy \\truenas\path\to\share c:/test_folder /MIR /R:1 /W:1. เนื่องจากผมก็ไม่เคยใช้ robocopy และไม่เคยรู้จัก mode ทั้ง 2 ก็เลยังไม่ได้แนะนำเพิ่มเติม ครับ Backup mode allows Robocopy to override file and folder permission settings (ACLs). Oct 8, 2008 · OK. Jan 13, 2023 · To use Robocopy to copy files fast on Windows 10, use these steps: Open Start. ) I notice your /d option to XCOPY, which looks like is designed to just copy new files. /S — Copy sub directories, but not empty ones. For those interested here are a couple of script files that can make using Robocopy to do extensive file operations quite easy. Switches for robocopy. However, when the copy command is re-executed after an interruption, the copy job restarts at the beginning. robocopy c:\temp\source \\MYSERVER\myshare /Z Backup mode. 0), so there it didn't resume files. /xjd Excludes junction points for directories. del "F:\TempRemoval\*. In the above command, change the source and destination paths with your configuration. Use the /S switch to avoid copying empty subfolders. /J :: copy using unbuffered I/O (recommended for large files). For example, instead of “ robocopy C:\Foo S:\Foo ” do this Unbuffered I/O is a simple file copy from a source location to a destination location. SyncBack. Oct 31, 2016 · Both systems are Windows 2012R2 with latest updates installed. If file access is denied Feb 26, 2018 · Yeah, Brandon, I'm logging all my robocopy outputs to files, and looking at them later. It increased the time from 1hour to 2. exe Learn with flashcards, games, and more — for free. – Ramhound. Example 2. The /v option tells Robocopy to verbosely list the files that it is copying. Robocopy is a command-line file transfer utility for Microsoft Windows. This example is for copying specific files and files newer than 6 months for a Windows user profile from one location to another. To improve Robocopy performance even more, use the /NODCOPY optioninstead of the /DCOPY:A option. Copies the file in restartable mode. Hopefully the source and destination are self explanatory, although they do need to be the full path of where the files are. Sep 27, 2017 · Here is another example for a copy in restartable mode, using the default multithreading (8). robocopy x:\*. The mov switch will not move subdirectories. Copies only files that have the archive attribute set, and resets the attribute. Robocopy /Z /E /sec /R:0 /W:0 /MT /log+:"E:\Robocopy_Logs\logfile. can successfully copy. I’m not the first one to realize that, apparently, but I did not think this was the root cause all along: robocopy is 20x slower than drag/droping files between servers What is robocopy restartable mode? Uncategorized. Robocopy - User Profile Copy or Sync. MIR: mirror files from source to destination R:1: retry files 1 time W:1: wait 1 second to retry files ZB: copies files in restartable mode. Source. If that fails it will use backup mode. This comprehensive Robocopy cheat sheet provides a complete guide with all available options. /Z :: copy files in restartable mode. If /LFSM is specified with no explicit floor value, the floor is set to ten percent of the destination volume's size. (If you can't see the program running, Robocopy also supports outputting to a log, which might be suitably helpful. Looking in Task Manager, the thread count for robocopy. PowerShell is a cross-platform (Windows, Linux, and macOS) automation tool and configuration framework optimized for dealing with structured data (e. SyncBack is option-ful and literally moves nearly every important piece of data in my house around weekly. Be shure you have a backup of your computers files and folders. Robust File and Folder Copy. Copies files in restartable mode. You should completely disable sleep on your machine while the job is running. Feb 4, 2014 · Robocopy copys the data first, then deletes the previous files even if they are on the same hard drive. With robocopy, it is impossible to specifically copy a single file. In the event that a file sync fails in the middle of a transfer, you can program Robocopy to retry the transfer using one of the two following commands: robocopy C:\src \\SRV1\share /Z. Robocopy Examples of Use. ROBOCOPY. * c:\robocopy /s /z I guess where I am a bit confused . To recursively copy all files and sub-folders, use this command: Example 2: Copy a single file: Example 3: Copy only a specific file type from source to destination: Aug 9, 2022 · Copy Files That Start With. Sep 25, 2015 · Whenever you want to copy one or more files and not a complete directory the file must be specified after the destination directory. Nov 8, 2013 at 4:22. --After re-arranging server, the file is copied across servers in the same domain and server location now. /Z: Copies files in restartable mode. . That here is my script to move files older than a certain amount of days-. I created a local directory with several junction points (which all point to the different folders I want to backup) and a network drive, which is a SMB share on the Internet (cloud hosting provider). In restartable mode, should a file copy be interrupted, Robocopy can pick up where it left off rather than re-copying the entire file. Using robocopy on the new server with the command line robocopy /S /ZB /MOVE /J /DCOPY:A /V /FP \\oldserver\shared\folder X:\folder. If file access is denied e. Aug 16, 2016 · /LEV:n :: only copy the top n LEVels of the source directory tree. What you may notice is that if you run this command, it will only state that there are 4 skipped files. /R:5 — Retry 5 times (you can specify a different number, the default is 1 million). This is no longer the case; if. Specify the source and destination directories immediately after the file name in the source directory to robocopy a single Jan 5, 2010 · 2. Uses FAT file timing instead of NTFS. log - Outputs everything to C:\robocopy. Created by Kevin Allen [2] and first released as part of the Windows NT 4. /COPYALL: Copies all file information. 1: Unzip the files. Staring without /MT tool 1314 seconds and got -again- worse with 1 thread. Default is Aug 10, 2022 · Another great feature of Robocopy is that it works well with UNC paths and can resume operation in case of a network interruption. ## /ZB : Use restartable mode; if access denied use Backup mode. cmd" to a place on your computer like c:\programs or something. exe. /zb. robocopy c:\hope c:\hope2 /e. Slow Data Throughput using Robocopy and FSx Filesystem for Windows File Servers. /Z Copy files in restartable mode. /R:n : Number of Retries on failed copies – default is 1 million. Robocopy is functionally more comprehensive than the COPY command and XCOPY , but replaces neither. This is evidenced when the top destination file (which was already completely written before the job interruption See full list on lazyadmin. robocopy C:\Source C:\Destination *. Mar 3, 2024 · Robocopy, with its versatility, caters to a range of real-time file management scenarios. Rightclick om the file and create shorcut. Created a dataset and SMB share on it and tried to start a copy from a windows server of a test folder that was 1. Folder and sub-folders/files with Security Permissions. If file access is denied Oct 9, 2019 · Robocopy command options explained Robocopy has a lot of features that you can use, in the command shown in this guide, we’re using the following options to make copy reliable and fast. From simple file transfers to complex file server migrations, let’s explore detailed examples of how Robocopy can be applied effectively: 1. If you are copying mostly small files, or even large files over a fairly reliable network, you don't really need the restartable mode anyways. Robocopy. /j. /Z — Copy files in restart able mode. In newer versions, mutithread is on by default (8 threads). Scenario: Copying all files from C:\source to D:\destination. The /mir switch will cause robocopy to delete any files existing in the destination that are not in the source. will it only copy new or changed files by default . Sep 23, 2015 · On the other side, robocopy with /zb - Uses Restart mode. Both the windows server and truenas have 10 gbit network cards and are linked through a 10 gbit ROBOCOPY includes numerous options and flags that control its behavior: /S: Copies subdirectories, but not empty ones. Feb 15, 2018 · /Z : Copy files in restartable mode (survive network glitch). By default Robocopy will only copy a file if the source and destination have different time stamps or different file sizes. – Darius. krisposkitt (kposkitt) September 7, 2022, 1:53pm 8. PowerShell includes a command-line shell, object-oriented scripting language, and a set of tools for executing scripts/cmdlets Oct 25, 2023 · To maximize the use of Robocopy, here are the steps to configure file sharing in Windows 10. /W:10: Specifies the wait time between retries. To copy a folder with all files and subfolders, use the following command: robocopy c:\temp\source c:\temp\destination /E /DCOPY:DAT /R:10 /W:3. Buffered I/O incurs a performance penalty the first time the file is May 9, 2013 · The /IPG:20 (inter-packet gap) will slow down the transmission considerably, but provides stability. You can copy files that start with a specific character or word. /j: Copies using Jan 19, 2022 · /LOG+:C:\robocopy. Jul 1, 2023 · Copies files in backup mode allowing Robocopy to override file and folder permission settings (ACLs). However, if you use the proper filtering, which you’ll learn about below, you can robocopy a single file. /ZB: Uses restartable mode; if access is denied, switches to backup mode. /Z : Copy files in restartable mode (survive network glitch). "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 . If access is denied, use backup mode. This is NOT the perfect answer. The command below will copy the files in restartable mode. Aug 5, 2007 · robocopy "H:\Source" "z:\Dest" /S /Z. Copy file if access denied. Backup mode allows Robocopy to override file and folder permission settings (ACLs). I don’t recommend using backup, restartable mode, or jobs. robocopy to apply the requested operation on files inside the System. Copies files in backup mode allowing Robocopy to override file and folder permission settings (ACLs). I don't know if there were some particulars of the systems I was working with that made that the case, but dropping /Z make robocopy go from crawling along to damn close to maxing out the connection. /J : Copy using unbuffered I/O (recommended for large files). 4 Spice ups. Would be nice if the help file would be updated or describe the switches more, it's really kind of lacking information. Use copy or PowerShell’s Copy-Item for that. copy files in restartable mode. /ZB — Uses restartable mode. /zb: Copies files in restartable mode. We would like to show you a description here but the site won’t allow us. I’m not the first one to realize that, apparently, but I did not think this was the root cause all along: robocopy is 20x slower than drag/droping files between servers Jan 10, 2009 · /MIR Activates mirror mode, deleting any files in the destination that are not present in the source (equivalent to /E and /PURGE). /ZB :: use restartable mode; if access denied use Backup mode. Robocopy has many features, and in the command shown in this guide, we’re using the following switches to make copy reliable and fast. 1 and C. 4. This provides the best performance, but at the expense of not copying the DOS-style attributes, the extended attributes, and the alternae data streams of directories. The last, but definitely not the least, option I will cover today is the backup mode option /B. 8 is the default, and 16 is a reasonable number to test first. So, if I want to run robocopy daily on the same directory and subs and then only copy new/changed files on each subsequent run . /IPG. Volume Information directory as well. /E — Copy Sub directories, including empty ones. TrueNAS and robocopy (slow speed) other modes of copy have normal speed. Log files that are skipped. Useful for copying large files over a slow Sep 7, 2022 · Robocopy will copy over any new, missing, or changed files. Syntax ROBOCOPY Source_folder Destination_folder [ files_to_copy] [ options ] Key files_to_copy : A list of files or a wildcard . Step 3: Select the Properties option and click the Sharing tab. If you want to go deeper, then I would suggest rsync as this can compare the source and destination checkums. In backup mode, robocopy overrides file and folder permission settings (ACLs), which might otherwise block access. You can use it for backups, file server migrations, file server reorganizations, determining which files haven’t been touched in a long time, cleaning up old files, copying folder structures, and so much more. Feb 24, 2023 · Robocopy Examples for Copying. ## /NOOFFLOAD : Copy files without using the Windows Copy Offload mechanism. ), REST APIs, and object models. /S — Copy subdirectories, but not empty ones. robocopy can restart in the middle of the file if /z was used which is much better if something interrupted the transfer compared to xcopy. :/ For instance; if you want to copy over the "Blackberry" folder, it will only copy over the files inside said folder, and not actually put the "Blackberry" folder into the backups folder Sep 29, 2012 · PC Self-Help Articles and Guides. Displays file sizes in bytes. Apr 7, 2022 · Copies files in restartable mode. r/PowerShell. Sep 24, 2017 · In the spirit of considering the XY problem, I point out that in Windows 10, you can check out the built-in Robocopy. As you can see from the screenshot above, the command copied 3 files and 1 directory from C:\Gov_Secrets to C:\Public_Knowledge. Jul 24, 2020 · Text files. robocopy C:\source \\srv-vm2\share file*. Copies file attributes. This allow copying of files you might otherwise not have access to assuming it's being run under an account with sufficient privileges. Step 2: Browse and choose the folder with the files you want to transfer. Optionally add a /ZB if you run your CMD as administrator. Sub-folders are excluded. If access is denied, this option uses Backup mode. \Publish "DESTINATION_HERE" /MIR Mar 11, 2023 · Robocopy command breakdown. For example, I will copy all files that start with the word “file”. 0 Resource Kit , it has been a standard feature of Windows since Windows Vista and Windows Server 2008 . The only problem I have is that certain files I need are added into this folder that are 3-4 years old. I'm also not sure whether priority is the real culprit, or exactly how a change in priority (via START or otherwise) would affect the functioning of a Robocopy command. That copies at about 5-10MB/s. Mar 1, 2023 · What really made the copy-process slow: /z-option (restartable copy process). Robocopy seems to handle the network quirks better than xcopy. If it works better with this switch than without, then you have an issue with the router not being up to the task. Syntax: Robcopy “source path” “destination path” {switches} Useful Switches: /e – include subfolders in copy. g. log" \\Folder 1 \\Folder 2 Here is an example where we only want to copy the root level folder and the folder structure below it (using Lev:1), but no files. Mar 29, 2016 · This is what I want to accomplish: Copy all the data from Server A Drive H to Server B Drive B. The /z option tells Robocopy to copy files in restartable mode. 5TB. I've recently installed a 100TB Z2-raid with truenas. This is my Robocopy command: ROBOCOPY \\sourceserver\H$ H:\ /MIR /ZB /SEC /R:10 /W:10 /MT:10 /V /TEE May 28, 2024 · In restartable mode, should a file copy be interrupted, robocopy can pick up where it left off rather than recopying the entire file. It will retry by default if file is open, and often will retry way to many (2012 R2 retry default is one million) so I always set it to 10 or something reasonable /R. How to use the script. robocopy c:\hope c:\hope2. One was /MT:1, one was /MT:8, and the last was /MT:16. Some details. Example 1. I kicked off 3 file transfers all at the same time from different command prompts. Logically, the problem is either with the router, or with robocopy, or some unknown glitch in Windows 7. uheaomnucyimsqumbtxg