Backup Exec 10.d -11.d for Windows Servers: One or more Distributed File System Replication (DFSR) replication groups may not be visible for selection if replication folder names are exactly duplicated, and as a result some replication folders are not backed up.

Article:TECH49697  |  Created: 2008-01-23  |  Updated: 2012-02-02  |  Article URL http://www.symantec.com/docs/TECH49697
Article Type
Technical Solution

Product(s)

Issue



Backup Exec 10.d -11.d for Windows Servers: One or more Distributed File System Replication (DFSR) replication groups may not be visible for selection if replication folder names are exactly duplicated, and as a result some replication folders are not backed up.


Cause



A potentially data threatening issue with backup using the Distributed File System Replication (DFSR) capability was introduced with Microsoft's Windows 2003 R2 release. This issue applies to Backup Exec 10.1 for Windows Server with Hotfix 31 (Windows 2003 R2 Support), and 11d (integrated R2 support). Any fixes included with Hotfix 31 for BEWS 10.1 will be retained with the application of this hotfix. All other versions of the product are not affected as they do not support Windows 2003.
 
How to Determine if Affected

The problem occurs when all of the following conditions simultaneously exist:
  • Backup Exec 10d with Hotfix 31 (R2 Support), or Backup Exec 11.d for Windows Servers is installed
  • A Microsoft Windows 2003 Server is configured with R2
  • The DFSR (Distributed File System Replication) component has been added to the Windows 2003 R2 Server
  • Two replication groups exist where each has a replication folder of the same name. 
Description

In the figure below (Figure 1), there are two replication groups (Sales & Support), pointing to two different folders. However the 'target' folders are named the same.

The issue occurs because of the way in which the operating system presents the replication objects.  The operating system presents the replication folder name, rather than the unique group name. As a result, when two replication groups are presented with the same identifying folder name, Backup Exec ignores the second and only displays the first folder selection for backup.
 
Figure 1

 



Solution



This issue has been resolved in the hotfix and service packs listed below:
 
Symantec Backup Exec (tm) 10.1 (10d) for Windows Servers revision 5629 Hotfix 44
Symantec Backup Exec (tm) 11.0 (11d) for Windows Servers revision 6235 Service Pack 3

Workaround

The DFS Replication data protection interface does not report the Group Name associated with the Replication Folder names.  Therefore, to alleviate name conflicts and to better identify Replication Folder contexts, Symantec recommends including the Replication Group name with in the Replication Folder name when creating a Replication Folder.
 
Best Practices
Symantec strongly recommends the following best practices:
1. Always perform a Full backup prior to and after any changes to your environment.
2. Always make sure that your environment is running the latest version and patch level.

Supplemental Materials

SourceETrack
Value837724
Description

Synthetic backup misses some files and folders even after Hotfix 33


SourceETrack
Value770345
Description

DFSR : multiple groups with replication folders of the same name will not show more than one of the folders


SourceETrack
Value851098
Description

DFSR : multiple groups with replication folders of the same name will not show more than one of the folders


SourceETrack
Value1109714
Description

Need to improve browsing for DFSR



Legacy ID



285992


Article URL http://www.symantec.com/docs/TECH49697


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