When running GRT enabled backup jobs to RDX media, the media fills up and causes failures of subsequent jobs. A review of the media content using Windows Explorer, shows that the IMG folders are not being overwritten.
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 2 (TECH203155)