I have a difficult backup schema, I am experimenting some issues like as:
I am using Open File Agent, (Fileserver and SQL) the backups jobs crashes constantly, sometimes caused by disc space.
The jobs takes so much time to finish, some of them until 32 hours.
I do differential backups mon-fri, full sat & sun on a HP MSL6000(28 Slots) Tape library, and I do Duplicates on a Sony LIB 162(16 Slots). The sources backups finish well, but takes too much time, then the duplicates constantly fails.
The main idea is to implement the backups best practices to solve this issues.