Recovery Point Merge Failure May Render Recovery Point Unrecoverable
What is the issue?
- Arcserve D2D r16 Update 7 added the ability to resume the recovery point merge process if a previous merge job failed or crashed. However, since releasing Update 7 we have determined that if a merge fails or crashes after more than 10% of the merge job has been completed, the recovery point chain may be corrupted resulting in continued backup, merge, and restore errors.
- Notes:
- This issue applies only if you upgrade from Arcserve D2D r16.0 Update 7 directly to Arcserve UDP 5.0. This issue has only been found with systems running Update 7. Systems running previous updates do not have this issue.
- This issue applies only if the Backup Data Format is set to Standard format. As a result, it is recommend to use the Advanced option (default).
- This issue has been fixed and tested in Arcserve D2D r16.0 Update 8 and Arcserve D2D r16.5. If you have determined that the existing recovery points in your environment have been affected, you must run a Full Backup to a different backup destination to restart the recovery point chain.
- Data corruption could have occurred during the merge process of previous Arcserve D2D r16 Update 7 recovery points. Upgrading to Arcserve D2D r16 Update 8, Arcserve D2D r16.5, or Arcserve UDP will not repair any data corruption already present in existing recovery points.
- Data from the corrupted recovery points may not be recoverable using the Arcserve UDP recovery interface. We strongly recommend testing multiple recovery points to determine your level of recoverability.
Additional information related to merge issues and data corruption can be found in KB article:
What to do?
The AFUtil.exe utility can be used to scan your backup sessions and confirm the integrity of the backed-up data. It is strongly recommended that you access the following KB article to download the utility and then run the utility immediately:
Important! Because this utility performs a complete scan of your backed-up data for the selected recovery point, this can be a time-consuming process. The utility cannot run if other jobs are running at the same time. Verify that the Arcserve UDP Web Service is stopped and that there are no active jobs running.
For more information about this utility, see AFUtil.exe Utility.