Windows File Archive on Deduplicated Volume

Last post 09-20-2019, 9:51 PM by Wwong. 1 replies.
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  • Windows File Archive on Deduplicated Volume
    Posted: 09-20-2019, 6:55 AM


    I have a question about file archive on deduplicated volume.

    One of our customer has a File Server which it is Windows 2012 R2 and Windows Deduplication enabled on the volume.

    We want to do Windows File System Archive on this server.

    One of volume' s actual size is 200-300GB and deduplicated size is also 300mb.

    When we try to run a job on Commvault, we saw that the Application size is 300mb.

    Is this normal or is there anything I missed ?

    Best Regards.

  • Re: Windows File Archive on Deduplicated Volume
    Posted: 09-20-2019, 9:51 PM

    Hi omer 

    When using Windows Deduplication the following behavior is seen (Documentation -

    • The file is backed up every time a change is made to the file and the file is deduped later. However, synthetic full backups consolidate the data.
    • Deduped files are backed up but not archived (stubbed).
    • Files that are not deduplicated are archived.
    • Files that are already archived using OnePass are not affected by the windows data deduplication feature.
    • You must use the recursive scan method for backups. If you have selected the Check archive bit check box, the deduplicated files are backed up again even though there was no change in the file. Clearing the Check archive bit option prevents the same version of the file from being backed up again.

    Can you please make sure recursive scan method is set on the Client.



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