Some .bkf files are not deleted by DLM(Data Lifecycle Management) after retention period of backup set expires if it is spanned across multiple disk storages
Some .bkf files are not deleted by DLM after the retention period of the backup set expires when it is spanned across multiple disk storages.
When a backup job runs to a storage device pool which contains multiple disk storages, the backup set can be spanned across multiple disk storages. After the retention period of the backup set expires, the .bkf files on a disk storage which is firstly used are deleted by DLM. However, the .bkf files on the other disk storages are not deleted.
This issue is currently under investigation by Symantec Corporation. For more information please check the following article.