Verify media set after duplication

Hi!

I have this customer who backups to disk only. Their jobs are backing up the resources first to a local SATA hard disks, then duplicate to external USB3 disks. So far, everythings working as it should.

However, duplication takes a lot of time, mostly by the verification process after the duplication job. Is it necessary to run a verify after duplication if the both the sources and destination are disk-based?

Thanks!

Marco