Somejob is overwriting.

Hello,

I have some backups that are backing up to tape and they all should be appending but at the end of the weekend out of 4 tapes only 1 was full and the other 3 were 3/4 full. There is only one drive assigned to the partition. 

There is anyway to check if they are all apending? And if they are all already set to append why they're not?

Regards.