Specifies the options to use with the robocopy command, including copy , file , retry , logging , and job options. Copies files in restartable mode. In restartable mode, should a file copy be interrupted, Robocopy can pick up where it left off rather than re-copying the entire file. Copies files in backup mode. Backup mode allows Robocopy to override file and folder permission settings ACLs. This allows you to copy files you might otherwise not have access to, assuming it's being run under an account with sufficient privileges.
Specifies which file properties to copy. Specifies what to copy in directories. Deletes destination files and directories that no longer exist in the source. Adds the specified attributes to copied files. Removes the specified attributes from copied files. Creates multi-threaded copies with n threads. The default value for n is 8. Copies only files for which the Archive attribute is set, and resets the Archive attribute. Includes only files for which any of the specified attributes are set.
Excludes files for which any of the specified attributes are set. Excludes files that match the specified names or paths. Excludes extra files and directories present in the destination but not the source.
Since backup files can get quite large, perhaps we want to make sure that the destination folder does not grow too quickly with stale backup files. Often manual backups or temporary copies are put into backup folders, and it is all too easy to run out of disk space.
This operation makes sure that all of the files in the source directory make it to the destination directory and remove all destination files that are not present in the source directory. This can potentially delete files in the destination directory so use with caution! As mentioned above, there is a unique behavior related to security permissions and destination directories. When using the mirror switch, you might find that the file permissions themselves are not changed, only destination folder permissions.
This is by design as for performance, and for practical reasons, individual file permissions were not intended to be copied using the mirror command. What does this look like in practice?
The result of a mirror command will result in the following file and folder permission structure. As you can see, the only permissions that are carried over are the unique folder permissions.
The unique file permissions will not be carried over. Of course, there are plenty of scenarios where you would like the permissions to be copied and kept in sync; those scenarios will be explored in further detail later on in the article. These changes are primarily around copying file security permissions which are made easier in the Vista version of Robocopy.
One of the simplest ways to take advantage of the mirror command is to simply mirror two directories on a single server. The verbose command is useful to see what Robocopy is doing and make sure the files that we want to copy are doing so. Depending on your needs, this might work just fine. File attributes are copied with the files, but the file security settings are not copied.
The next example you may want to see is how to properly copy over the files with the security intact? In this example, we have a directory with four files just like the first example. In addition, we have modified the permissions on test2. Here we are also going to modify test3. After running the following command, we will see that the permissions related to the user are copied over. Since the files were the same but with different permissions, the correct permissions have been copied while the file data itself remains synced.
Make sure to use Run as Administrator if you get access denied on copying over files. The setting of the permissions may require administrator rights to perform depending on your system security configuration. Looking at the test2. If we check on test3. Excludes directories that match the specified names and paths. Excludes extra files and directories. Extra files are files that exist in the destination directory. Excludes "lonely" files and directories. Specifies the maximum file size to exclude files bigger than N bytes.
Specifies the minimum file size to exclude files smaller than N bytes. Specifies the maximum file age to exclude files older than N days or date. Specifies the minimum file age exclude files newer than N days or date. Specifies the maximum last access date excludes files unused since N. Specifies the minimum last access date excludes files used since N If N is less than , N specifies the number of days.
Excludes junction points, which are normally included by default. Specifies the number of retries on failed copies. The default value of N is 1,, one million retries. Specifies that the system will wait for share names to be defined retry error Specifies that files are to be listed only and not copied, deleted, or time stamped. Reports all extra files, not just those that are selected.
Produces verbose output, and shows all skipped files. Includes the full path names of the files in the output. Specifies that directory names are not to be logged. Specifies that the progress of the copying operation the number of files or directories copied so far will not be displayed. Shows the estimated time of arrival ETA of the copied files. Writes the status output to the log file overwrites the existing log file. Writes the status output to the log file appends the output to the existing log file.
Writes the status output to the log file as Unicode text overwrites the existing log file. Writes the status output to the log file as Unicode text appends the output to the existing log file. Writes the status output to the console window, as well as to the log file. Specifies that parameters are to be derived from the named job file. Specifies that parameters are to be saved to the named job file.
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