Symlink to Unsupported Reparse Point Error When Trying to Restore a File

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1. Scope

This article will explain why you have received an "Unsupported Reparse Point" error when trying to download a file from a file restore. These files will typically show their file size as "0 KB", or will show "Symlink to unsupported reparse point" when hovering over the file.

This only affects Windows 8 and Windows 2012 servers.

Example showing the "Symlink to unsupported reparse point" error:

 

2. Cause

You are receiving the "Symlink to unsupported reparse point" error because the volume you are restoring has data deduplication enabled on it. The volume will back up correctly, but you will be unable to use File Restore to restore deduplicated data.

To restore files from backups of these volumes, you will need to use virtualization, iSCSI Restore, or Direct Restore.

3. Solution

1. Verify that the volume has data deduplication enabled and then disable data deduplication on all volumes that the Datto device is backing up. This will only correct future backups, and will not change the backups from when data deduplication was enabled.

2. Contact Technical Support to facilitate an iSCSI restore to gather your data.

3. Alternatively, you can mount an offline Virtual Machine yourself for that specific point and restore the files from within the Windows environment. You can utilize a feature within VirtualBox to pass through a NAS share to a Virtual Machine to offload the files you need to that NAS share. This will allow you to restore the files via an offline Virtual Machine. You can set this up by following this article here. If you have any issues with this solution, please contact our Technical Support team.

4. Additional Information

Here are some useful links if you'd like more information on data deduplication:

http://blogs.technet.com/b/filecab/archive/2012/05/21/introduction-to-data-deduplication-in-windows-server-2012.aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/hh769303(v=vs.85).aspx


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