Optimized Duplicate (OptDup) backups, between Backup Exec Deduplication folders, fail with '0xe00084ec - A backup storage read/write error has occurred'. The error discusses 'tape based storage' but both source and target storage are disk based.
Application Event logs indicate a sequence of errors;
Adamm Mover Error: DeviceIo: ostutil(OstCopyExtentImage):Copy image failed because of error 2060018
Adamm Mover Error: DeviceIo: ostutil(OstCancelCopyImage):Async cancel failed because of error 2060001
Final error: 0xe00084ec - A backup storage read/write error has occurred.
If the storage is tape based, this is usually caused by dirty read/write heads in the tape drive. Clean the tape drive, and then try the job again. If the problem persists, try a different tape. You may also need to check for problems with cables, termination, or other hardware issues.
If the storage is disk based, check that the storage subsystem is functioning properly. Review any system logs or vendor specific logs associated with the storage to help determine the source of the problem. You may also want to check any vendor specific documentation for troubleshooting recommendations.
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in 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.
Backup Exec 2010R3 Rev 5204 Service Pack 3 (TECH203157)
Backup Exec 2012 Rev 1798 Service Pack 2 (TECH203155)