Second question :

I have a new tape library as well which I want to take an offsite backup to from the already connected main D2D Appliance

so what do you recommend for me : to have a seperate backup job which take the same backup afterwards to the tape library so having two seperate jobs for the same backup one to the D2D and the other to tape library ?

or 

there is an option on the netbackup which enable me to juct copy the backup from the D2D directly to the tape library without having an impact on the client and having the same backup twice on each same client ? and if so is there a specific license needed for such feature?

I have a the netbackup 6.5.5

Thanks & Best Regards,