Unable to perform a normal restore in Backup Exec 2010 when restoring a subset of data from a backup set that is 4(TB) or larger that was created in previous version of Backup Exec for Windows..

Article:TECH128478  |  Created: 2010-01-06  |  Updated: 2012-02-13  |  Article URL http://www.symantec.com/docs/TECH128478
Article Type
Technical Solution


Issue



Unable to perform a normal restore in Backup Exec 2010 when restoring a subset of data from a backup set that is 4(TB) or larger that was created in previous version of Backup Exec for Windows..


Error



Final error: 0xe0009446 - Unable to perform a normal restore because the maximum backup set size was exceeded.  Please disable "Fast File Restore" and rerun the restore job.
Final error category: Job Errors

For additional information regarding this error refer to link V-79-57344-37958

Restore- V-79-57344-37958 - The backup of resource '\\SERVER\C:' was written by a previous version of Backup Exec.  The maximum size for a backup set in that version was exceeded.  To restore the data, disable the 'Use Fast File Restore' feature, and run the restore job again.  For information on how to disable the Use Fast File Restore feature, see  http://www.symantec.com/docs/TECH43336  

(FIGURE 1)


Cause



In Backup Exec for Windows 2010 a restore job fails under a certain sub-set restore condition (not restoring the whole set) when the backup set is from a previous version of Backup Exec and the backup set is larger than 4(TB).  The following Errors are reported in the restore job log (FIGURE 1).

MORE INFORMATION:

After disabling "Fast File Restore" using BEUTILITY following the instructions in TECH43336 (www.symantec.com/docs/TECH43336 ) the job fails with the same error.  Attempts to re catalog and perform the restore results in the same job failure.


Solution



This issue is resolved in Backup Exec 2010 R3 Hotfix 173536.  See Related Documents.

 

 

Backup Exec 2010 and 2010 R2

In Backup Exec 2010 HOTFIX 354875 is now available for this issue in the current version of the product mentioned at the end of this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue. 

SPECIAL NOTE: After applying HOTFIX 354875 for Backup Exec 2010 or using Backup Exec 2010 R2 to perform the catalog and restore you still must disable "Use Fast File Restore" using one of the methods outlined below when restoring from older backup sets (Backup sets written in Backup Exec 2010 without HOTFIX 354875, Backup Exec 12.x, and 11d backup sets).  The expected behavior of the restore job is that it may take just as long as the original Backup job took depending on where the data to be restored is located on the tape(s).  Additionally the restore job may restore the data and continue to run for and extended period of time while it mounts all the tapes in the backup set. Once all the tapes have been read and mounted the restore job will complete.  If the data is physically restored and the restore job continues to run the restore can be cancelled in the Backup Exec job monitor.

Backup sets written in Backup Exec 2010 with HOTFIX 354875 or Backup Exec 2010 R2 will not experience the large amount of time to perform the restore.

After the data is restored turn on or enable "Fast file restore" using BEUTLITY or registry.

Two methods to turn off "Use Fast File Restore" in Backup Exec for Windows 2010 and 2010 R2.

1) Technote TECH43336 ( www.symantec.com/docs/TECH43336 ). 

2) Enabling\Disabling "Fast File Restore" by editing the Backup Exec registry.

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.

A) On the Backup Exec media server open the registry edit by going to Start - Run - Regedit

B) To disable Fast File Restore set registry key  to 0.  Set the registry key to 1 to enable "Fast File Restore"

HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Backup Exec For Windows\Backup Exec\Engine\Tape Format/Use Fast File Restore

C) Restart the Backup Exec services 

3) Delete the old catalogs and Re-catalog the media again.

 

 


Supplemental Materials

SourceETrack
Value1989282
Description

Unable to restore one file from 4TB Backup Exec 12.5 et in Backup Exec 2010.


SourceError Code
Value0xe0009446
Description

Unable to perform a normal restore because the maximum backup set size was exceeded. Please disable "Fast File Restore" and rerun the restore job.


SourceUMI
ValueV-79-57344-37958
Description

The backup of resource was written by a previous version of Backup Exec. The maximum size for a backup set in that version was exceeded..



Legacy ID



348482


Article URL http://www.symantec.com/docs/TECH128478


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