Dell NetWorker 19.9 Administration Guide

Unoptimized full and incremental backup

NetWorker creates an unoptimized data deduplication backup under the following conditions:

• When you specify in the save set attribute of the client resource, a backup path that is a subdirectory of the volume, except in the case where the subdirectory is the root of a mount point.
• When you perform a manual backup of the client that does not make up the entire volume.
• When you specify the string VSS:NSR_DEDUP_NON_OPTIMIZED=yes in the Save Operations settings of the client resource. If the save operation flag is set to yes the data deduplication backup is not optimized. If no string is present, or if the attribute is set to no, a normal volume level backup is performed.

  To add this string, perform the following steps:

  1. From the NetWorker Administration window, select the Protection menu.
  2. In the left navigation pane, select Clients, right-click the client, and then select Modify Client Properties.
  3. On the client Properties text box, select the Apps & Modules tab.
  4. In the Save operations field, enter the string and attribute setting and then click OK.

     In an unoptimized data deduplication backup, all files are rehydrated before the back up is performed. The deduplication chunk store directory is not backed up.

     Windows dedup backups, either optimized or unoptimized, will be corrupt if they are backed up with VSS off.

Reasons to create an unoptimized data deduplication volume backup include:

• Support restores of a Windows Server 2012 and Windows Server 2012 R2 backups to an earlier version of Windows Server.
• Support restores of a Windows Server 2012 Windows Server 2012 R2 backups to a non-Windows computer.