Barcode label is only updated and Media set / Media label are not updated when scanning a new media with a barcode label without inventory.
Please run an inventory job. The job will update Media set / Media label.
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 2012 Rev 1798 Service Pack 3 (TECH205351).
Backup Exec 2012
Tape Library with barcode reader