If a piece of media owned by a VTL is given a manually set Media Description, then after running an overwrite backup job to that same media the Description field is empty. Performing a similar operation to media held in a physical tape library maintains the media description.
The described problem against VTL is by design. The behaviour where tape media maintains the description is the incorrect operation.
Currently Symantec intends to ensure that the media descriptions are removed consistently across all media during an overwrite operation in the next major version of Backup Exec. However, in the next major version, a configuration change will also be provided that allows all media types to maintain the description during overwrites. Details of the method to change the configuration will be made available after the version of Backup Exec that supports the changes is released.
Symantec Corporation has acknowledged that the above-mentioned issue is present in the current version(s) of the product(s) mentioned at the end of this article. Symantec Corporation is committed to product quality and satisfied customers.
There are no plans to address this issue by way of a patch or hotfix in the current or previous versions of the software at the present time. However, the issue is currently scheduled to be addressed in the next major revision of the product. Please be sure to refer back to this document periodically as any changes to the status of the defect will be reflected here. Please note that Symantec Corporation reserves the right to remove any fix from the targeted release if it does not pass quality assurance tests. Symantec's plans are subject to change and any action taken by you based on the above information or your reliance upon the above information is made at your own risk.
Please contact your Symantec Sales representative or the Symantec Sales group for upgrade information including upgrade eligibility to the release containing the resolution for this issue. For information on how to contact Symantec Sales, please see http://www.symantec.com