Veeam Backup & Replication – Tape Backup Compatibility
There is some consideration about Veeam Backup & Replication and native tape support and most important thing is:
Veeam Backup & Repliction doesn’t support tape via ESXi Passthrough.
So if you want to deploy a backup solution with tape and backup your repositories on tape drives, you have to use a physical server as tape server.
Plug your tape device via FC or SCSI or any other supported connection types to tape server.
You can assign tape server role to any server or also assign to Veeam Backup & Replication server too.
Hope this post help you to prevent facing with some strange issues and confusion.
Read this KB: 1016407 for more information.