This post from MiniTool introduces how to fix the “Windows Server Backup incorrect function” issue. Also, if the related solutions are not working, you can try the Windows Server Backup alternative – MiniTool ShadowMaker to finish the task.
I am trying to get a Windows Server 2012 box to back up to a NAS. However it fails every time no matter what I select to backup (System State, BMR, single file, etc), the job will fail to give a Windows Server Backup incorrect function error.Microsoft

When you back up files or folders to a network share or external hard drive with Windows Server Backup, or restore system image with bootable media, you may encounter the “Windows Server Backup incorrect function” issue. The following are the possible messages you may receive:

  • The backup process started but then failed with Windows Server Backup “Incorrect Function”.
  • There was a failure in preparing the backup image of one of the volumes.
  • The system image restores failed. Incorrect function (0x80070001).
  • There was a failure in preparing the backup image of one of the volumes in the backup set. Incorrect function.
Windows Server System State Backup Fails? Fix It Now!
Windows Server System State Backup Fails? Fix It Now!

You may meet the “Windows Server system state backup fails” issue when backing up the system. This post provides useful methods.

Read More

Fix 1: Remove the Reparse Point from the Library

To fix the “Windows Server Backup incorrect function on Windows Server 2012 R2”, you should delete the reparse points from the library and run the Backup Wizard again. Here is how to do that:

1. First, you need to locate the reparse point folder or its subfolder. To do that, click the Start menu > type cmd in it > right-click the result to choose Run as administrator.

2. Type dir /al /s and press the Enter key. The list of JUNCTIONs will be displayed.

Tips:
You see several entries that say "JUNCTION" and the location that the entries point to (“junction point” is another name for “reparse point”). When a program tries to write to a directory that is a reparse point, those files are sent  to the other directory instead.
locate the reparse point folder

3. Press the Windows + E keys together to open File Explorer. Locate the reparse point you found, right-click the reparse point icon, and click Delete.

4. Then, you can run the backup task again and check if the issue has been resolved.

Fixed: The Tag Present in the Reparse Point Buffer Is Invalid
Fixed: The Tag Present in the Reparse Point Buffer Is Invalid

ou may receive the “the tag present in the reparse point buffer is invalid” error message in Onedrive. This post tells you how to get rid of the issue.

Read More

Fix 2: Shrink the Volume

How to fix Windows Server Backup incorrect function? If the last sector is corrupted, you can meet the issue. Thus, it’s recommended to shrink the volume. Follow the below guide:

1. Press the Windows + R keys together to open the Run dialogue box. Type diskmgmt.msc in it.

2. Right-click the partition you need to shrink and choose Shrink Volume….

shrink the volume

3. Then, you can enter the size (in MB) you want to decrease and then click the Shrink button.

Fix 3: Change the Backup Path

If the backup path is over 110 characters, you may encounter the “Windows Server Backup incorrect function on Windows Server 2012 R2” issue. Thus, it’s suggested to use a shorter backup path when backing up to a network share.

If you use a NAS as a backup path but fail with an Incorrect Function error, you can also try to backup files to an external hard drive.

Fix 4: Allocate Disk Unit Size to 512 byte

To deal with the “Windows Server Backup incorrect function” issue, you can allocate the disk unit size to 512 byte.

1. Press the Windows + R keys together to open the Run dialogue box. Type diskmgmt.msc in it.

2. Then, right-click the disk and select the Format… option. 

3. In the Format window, select NTFS file system, 512 allocation unit. Then, check the  Perform a quick format option, and click OK.

allocate the disk unit size to 512 byte

4. Run the backup task again

Fix 5: Try Windows Server Backup Alternative

If the solutions mentioned above are not working, or you think the solutions are complicated, you can directly try the Windows Server Backup alternative – MiniTool ShadowMaker. It is a piece of professional Server backup software. It allows you to back up files, back up systems, move Windows to another drive, etc.

MiniTool ShadowMaker supports almost all storage devices that can be recognized by Windows, such as HDDs, SSDs, USB external disks, Hardware RAIDs, Network Attached Storages (NAS), Home File Servers, and so on.

Now, download and install MiniTool ShadowMaker.

MiniTool ShadowMaker TrialClick to Download100%Clean & Safe

1. Launch MiniTool ShadowMaker and click Keep Trial to continue.

2. Go to the Backup page after you enter its main interface. Then click the SOURCE module to choose the backup source. Choose Folders and Files and choose the files you want to back up.

3. Click the DESTINATION module to continue.

MiniTool ShadowMaker provides four destination paths to be chosen. Here, you need to click the Shared tab. Click the Add new button, and type the path, user name, and password to connect your NAS device.

choose the NAS drive as the destination

4. Click Back Up Now or Back Up Later to start the backup task now or later.

What Is a NAS Drive and How to Do a NAS Backup on Windows 10?
What Is a NAS Drive and How to Do a NAS Backup on Windows 10?

NAS devices enable many computers to share the same backup server at one time. If you want to learn more details of the NAS backup, you can read this post.

Read More

Bottom Line

That’s all for how to fix the “Windows Server Backup incorrect function” issue. You can try them one by one or use the Windows Server Backup alternative – MiniTool ShadowMaker to back up and restore the system, files, folders, etc.

  • linkedin
  • reddit